Currently, with multiple-choice questions in new quizzes, there is no possibility to unmark the choice and left a question without a response. Students have always to mark one of the options once they have marked one of them. @epistillo
This would be very helpful in our institution too! @Franaldo
How do idea conversations work in the Canvas Community?
What is the feature development process for Instructure products?
How do I create a new idea conversation in the Canvas Community?