Pass result and content of a multiple choice question to a variable in Storyline 360

I'm trying to do something similar: show the learner a Pick Many quiz question (ideally the built-in ones, but if not, custom build it), and extract the content of the choices they've selected as text variables. This is the closest forum post I could find to what I'm trying to accomplish. 

I can imagine some custom ways that I could make this work, but all are pretty time consuming.

It would be nice to be able to grab the data that would be exported using xAPI, but use it in the course itself. Surely there is a hidden variable containing the text of the selected question choices running somewhere in the background, otherwise how could this appear in an xAPI output? If I could grab this text and display it on a page later in the course, that would be ideal. 

Any suggestions?