Is it possible to do this?  I'd like to test two version of a page and see which generates the better user response, and I am wondering if there is a native feature or plugin that allows this. Thanks in advance.

There is no native built in functionality to achieve this, no.

For overall site design or certain pages, there is no way to automatically track or manage A/B split testing.  However, that shouldn't stop you from doing it yourself.  I've talked to some communities that created multiple landing pages that corresponded to different Facebook ads, and they tracked the landing page conversions on their own.  

The suite does contain built-in ad manager, which can automatically rotate ads.  I've also seen third party apps (like Newsletters from @Spanner) that offer A/B tracking of open rates, in case you'd like to contact or research more.  

Thank you for the feedback.

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