Please help me with the question below ,,

A student is studying for an exam 2 hours a day and is debating whether to study an extra hour. The student's marginal benefit Select one: a. is the benefit the student receives m\" from studying the extra hour. b. is the benefit the student receives , from studying all 3 hours. c. depends on the grade the student earns on the exam. V d. is greater than the student's {m . .2 marginal cost. "w\