Matching Drop Down Question - not 508/accesibility compliance?

Hi All, I'm trying to solve this same problem of making a drop-down matching quiz accessible. I am not able to add the quiz answer objects into the tab order. There are only two quiz objects in the tab order: "Textbox" which is the question and "Matching Drop-Down" which contains all of the answers. In the timeline, I can expand it and see the individual answer objects, but it seems that they are grouped and cannot be ungrouped, and there is no option to add the individual quiz answer objects into the tab order... Can anyone help me with this?