Quiz not allowing student to select answer choice in quiz

We've been able to have users work through the quiz questions for multiple choice only by using the keyboard to make the selections. Use the Tab key to move from one field to the next. You'll see a box highlight different fields in the course (not just the answers) so you may need to tab a handful of times to get to the answer choice. If you pass the answer, Alt-Tab will take you backwards through the sequence. Then, use Space/Enter to select the response and Tab to the Submit button and Space/Enter to Submit. This workaround is a hassle for the students but it at least allows the user to progress and earn a completion. We've not found any 'real' solution.