decontructing a coldfusion array loop

I am trying to deconstruct an array loop created by some one and they had instructions on how to call but if I do that value, I am being ended up in an error

Here is the code

<cfloop from="1" to="#ArrayLen(variables.elementObjectsArray[e].items)#" index="o">
    <option
        <cfif ArrayLen(variables.elementObjectsArray[e].items[o]) eq 3>
            class="#variables.elementObjectsArray[e].items[o][3]#"
        </cfif>
        value="#variables.elementObjectsArray[e].items[o][1]#"
        <cfif session.form[e] EQ "#variables.elementObjectsArray[e].items[o][1]#">
            selected="selected"
        </cfif>
    >
        #variables.elementObjectsArray[e].items[o][2]#
    </option>
</cfloop>

and they mention it to call it this way

// a 2-d array of items if type=select: ["optionValue","optionText","optionClass"]

here is dump of the array (variables.elementObjectsArray[e].items) (from comments)

i did that way, but i am always ending up in error, anyone can guide what i am missing here

This is the error in stack

<td class="struct" onClick="cfdump_toggleRow(this);" style="cursor:pointer;" title="click to collapse">StackTrace</td>
                    <td>
                    coldfusion.runtime.NonArrayException: Object of type class java.lang.String cannot be used as an array
    at coldfusion.runtime.Cast._List(Cast.java:1388)
    at coldfusion.runtime.CFPage.ArrayLen(CFPage.java:705)
    at cfForm2ecfc910767489$funcSHOWFORM._factor2(C:\ColdFusion2016\cfusion\wwwroot\water\cfcs\common\Form.cfc:289)
    at cfForm2ecfc910767489$funcSHOWFORM._factor3(C:\ColdFusion2016\cfusion\wwwroot\water\cfcs\common\Form.cfc:264)
    at cfForm2ecfc910767489$funcSHOWFORM._factor4(C:\ColdFusion2016\cfusion\wwwroot\water\cfcs\common\Form.cfc:259)
    at cfForm2ecfc910767489$funcSHOWFORM._factor5(C:\ColdFusion2016\cfusion\wwwroot\water\cfcs\common\Form.cfc:258)
    at cfForm2ecfc910767489$funcSHOWFORM.runFunction(C:\ColdFusion2016\cfusion\wwwroot\water\cfcs\common\Form.cfc:235)
    at coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:493)
    at coldfusion.runtime.UDFMethod$ArgumentCollectionFilter.invoke(UDFMethod.java:389)
    at coldfusion.filter.FunctionAccessFilter.invoke(FunctionAccessFilter.java:95)
    at coldfusion.runtime.UDFMethod.runFilterChain(UDFMethod.java:340)
    at coldfusion.runtime.UDFMethod.invoke(UDFMethod.java:235)
    at coldfusion.runtime.TemplateProxy.invoke(TemplateProxy.java:654)
    at coldfusion.runtime.TemplateProxy.invoke(TemplateProxy.java:443)
    at coldfusion.runtime.TemplateProxy.invoke(TemplateProxy.java:413)
    at coldfusion.runtime.CfJspPage._invoke(CfJspPage.java:3247)
    at coldfusion.runtime.CfJspPage._invoke(CfJspPage.java:3224)
    at cfregistration2ehtml927971521.runPage(C:\ColdFusion2016\cfusion\wwwroot\water\registration.html:53)
    at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:254)
    at coldfusion.tagext.lang.IncludeTag.handlePageInvoke(IncludeTag.java:743)
    at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:573)
    at coldfusion.runtime.CfJspPage._emptyTcfTag(CfJspPage.java:3851)
    at cfsystem2ehtml2885719.runPage(C:\ColdFusion2016\cfusion\wwwroot\water\system.html:7)
    at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:254)
    at coldfusion.tagext.lang.IncludeTag.handlePageInvoke(IncludeTag.java:743)
    at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:573)
    at coldfusion.runtime.CfJspPage._emptyTcfTag(CfJspPage.java:3851)
    at cfindex2ehtml2139074217.runPage(C:\ColdFusion2016\cfusion\wwwroot\water\index.html:237)
    at coldfusion.runtime.CfJspPage.invoke(CfJspPage.java:254)
    at coldfusion.tagext.lang.IncludeTag.handlePageInvoke(IncludeTag.java:743)
    at coldfusion.tagext.lang.IncludeTag.doStartTag(IncludeTag.java:573)
    at coldfusion.filter.CfincludeFilter.invoke(CfincludeFilter.java:65)
    at coldfusion.filter.IpFilter.invoke(IpFilter.java:45)
    at coldfusion.filter.ApplicationFilter.invoke(ApplicationFilter.java:484)
    at coldfusion.filter.RequestMonitorFilter.invoke(RequestMonitorFilter.java:43)
    at coldfusion.filter.MonitoringFilter.invoke(MonitoringFilter.java:40)
    at coldfusion.filter.PathFilter.invoke(PathFilter.java:153)
    at coldfusion.filter.LicenseFilter.invoke(LicenseFilter.java:30)
    at coldfusion.filter.ExceptionFilter.invoke(ExceptionFilter.java:94)
    at coldfusion.filter.ClientScopePersistenceFilter.invoke(ClientScopePersistenceFilter.java:28)
    at coldfusion.filter.BrowserFilter.invoke(BrowserFilter.java:38)
    at coldfusion.filter.NoCacheFilter.invoke(NoCacheFilter.java:60)
    at coldfusion.filter.GlobalsFilter.invoke(GlobalsFilter.java:38)
    at coldfusion.filter.DatasourceFilter.invoke(DatasourceFilter.java:22)
    at coldfusion.filter.CachingFilter.invoke(CachingFilter.java:62)
    at coldfusion.CfmServlet.service(CfmServlet.java:223)
    at coldfusion.bootstrap.BootstrapServlet.service(BootstrapServlet.java:89)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at coldfusion.monitor.event.MonitoringServletFilter.doFilter(MonitoringServletFilter.java:42)
    at coldfusion.bootstrap.BootstrapFilter.doFilter(BootstrapFilter.java:46)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at coldfusion.inspect.weinre.MobileDeviceDomInspectionFilter.doFilter(MobileDeviceDomInspectionFilter.java:121)
    at coldfusion.bootstrap.BootstrapFilter.doFilter(BootstrapFilter.java:46)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:544)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:359)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:616)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:831)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1634)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745) 
                    </td>

figured out it should go as: items = [['M,'M'],['F','F']]