Releasing Quiz Answers after the Quiz Period Ends
First, be sure your Submission View for the quiz is set to not show questions once the quiz is submitted. If not, click the Default View link and change the options.
When students submit this quiz, they see their grade immediately upon submission but not the questions and answers:
After the quiz period has ended, go back to the quiz and change the Submission View to whatever you want them to see. If you want them to see questions with their answer as well as the correct answer, you would choose these settings.
After changing the Submission View, students could then go to quizzes and click the dropdown next to their quiz to view the Submission option.
Clicking on submissions shows their score and each attempt. They click Attempt to see the results.