This idea would allow the ability for instructors who are wanting to open up prior quizzes for a review for the upcoming test but later restrict access not only to the answers but also the questions. This idea would allow quiz integrity and security.
The current workaround is a little labor intensive to manually uncheck the, "Let Students See Their Quiz Responses (Incorrect Questions Will Be Marked in Student Feedback)" when you could just set a date.
I propose a change that would look like something close to the image below.
Added to Theme
Increase options for restricting student results view in quizzes Theme Status: Identified