This is the actionscript that is on the question 1 movieclip on frame one and it takes the user to the question screen. To show that they have answered the question correctly, I inserted a keyframe on frame 2 and added a a red tick over the question 1 box. Also, so the user couldn't click on question one again, I deleted the actionscript that was there on frame 1.
So when the user has correctly answered a question, they will be able to tell as it will look like this: