I would like my students to be able to review each question, after I have graded it, so they can see their errors.
The option for students to view quiz results (including the question, their answer, and the grade) is under the "Options" section of the quiz settings:
What options can I set in a quiz?
For question types which are automatically graded and have a "correct" answer defined in the question, you can also set the options to show the correct answer.
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