Suppose That You Are Spending Two Hours a Day Studying

Multiple Choice

Suppose that you are spending two hours a day studying economics, and your grade is 85 percent. You want a higher grade and decide to study for an extra hour a day. As a result, your grade rises to 90 percent. Your marginal benefit is the

A) 5 point increase in your grade minus the opportunity cost to you of spending the hour studying.
B) extra hour per day you spend on studying.
C) 5 point increase in your grade.
D) three hours per day you spend on studying.