Clearing a quiz slide so that it can be answered again

I have created a scenario based learning interaction where students may navigate back to a quiz they have previously taken (i.e. at the end of each scene, they have the option of moving on to the next scene, or completing the scene again). When they elect to take the scene again, their previous answers still show in the quiz slides and it does not allow them to rest or take it again. 

At this stage we don;t need to track the responses so if that is getting in the way, then that's not a problem, but is there any way that they can be 'reset' when the student clicks the button to take them back to the start of the scene? 

Any advice appreciated! 

Dani 

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