I was astonished just now to learn that apparently, my Canvas settings were set so that students cannot see the correct answers after the quiz! :-O That seems like the dumbest thing in the world — you give an answer to some multiple choice question, and then discover you were wrong, but not what the right answer is. (?!)

Anyways, I never in a million years intended to hide the correct answers from students after they have completed the quiz, and I think I have now configured Canvas properly so you can see them. When you get a chance, you might take a peek at one or two of your old quizzes and verify that you can see the correct answers for any items you may have missed!