Quiz trigger wizard 'reset results' on modern player

The "Reset results" trigger is used to reset all of the graded questions associated with the specified Results slide.  It cannot be used to reset just one question.

Storyline's Graded Questions allow you to set the number of attempts. 

If more than 1 attempt is allowed, Storyline has built-in programming to show the appropriate layer. 

• If the user answers incorrectly and they haven't used all of the attempts, Storyline automatically shows the Try Again layer. (Storyline automatically adds that layer when the Attempts field is >1.) 
• If the user answers incorrectly, and they have used all of the attempts, Storyline automatically shows the Incorrect layer. 

The built-in Try Again function keeps the most recently chosen answers in the Selected state. If you want to clear the selections, add triggers to the Try Again button that change the state of all the response buttons to Normal. That would look something like this: