Hide right/wrong message by user – Urgent

Hey guys.

For driving license theory tests, it is in my case required that the users can decide whether to show a message of question being correct or wrong.

I know this can be set by default by admins, but is there anyway possible to move this selection to the user’s reach? Before starting the test, making them choose whether to see answers or not?

Please come back with anything on your minds. This very thing is the last of several requirements already met by this plugin. Last thing I need to let this be a succesful implementation.