Can you see edit history?

A student completed her work with Kami and turned it in. I graded it and returned it. She then resubmitted and said that I made a mistake grading, and that there were 2 questions that were marked wrong that should have been marked correct. How do I see the edit history to know if she is being honest?

Very sorry, but once you save it and send it to your pupil, the ‘Undo’ function could not be used until you make changes to the document again. So, you cannot see the edit history again.