After 3 Years at an Expensive University,Pierre Realizes That He

After 3 years at an expensive university,Pierre realizes that he doesn't want to finish school but really wants to be a chef.When Pierre suggests that he leave university for culinary school,his parents insist that he stay for one more year to get his degree.Which statement is TRUE?

A) Pierre's parents are correct: if he leaves university,it is as though he has wasted 3 years of tuition.
B) Pierre's parents are wrong: the marginal benefit to Pierre of another year of university is less than the marginal cost of university.
C) Pierre's parents are wrong: the marginal benefit to Pierre of another year of university is greater than the marginal cost of university.
D) It is impossible to tell who is correct.