Suppose That There Is Not Enough Parking at an Urban

Suppose that there is not enough parking at an urban university.Sometimes students come to campus,spend a few minutes searching for a parking spot,and then decide that going to class isn't worth the effort of continuing to search for a spot and go home.Assume that all professors give midterm exams on the same day.You would expect the optimal time spent searching for a parking space on that day to __________ because __________.

A) decrease;the marginal costs are higher.
B) increase;the marginal costs are lower.
C) increase;the marginal benefits are higher.
D) decrease;the marginal costs are lower.