Answer:
Monica's grade improvement is an example of the testing effect.
Explanation:
In psychology, the testing effect refers to an improvement in long-term memory accomplished by testing one's knowledge. That is, after studying a certain topic or subject, if you choose to retrieve that knowledge by answering quizzes or tests about it, you improve your chances of remembering it than you would by simply re-reading the content. In Monica's case, the improvement was clearly visualized by means of her grades. Testing effect can also be referred to as retrieval practice or practice testing.