Answer:
B) learned helplessness; stop trying to improve their grades
Step-by-step explanation:
This is because, in any given situation someone fund himself or herself in, there is a tendency to give up when all things seems to be working against the individual.
In the case of Nicole and her classmates, their growing frustration would definitely lead to helplessness to them. This would on the long run, cause them to stop trying to improve their grades.