Nathan Drinks Three Cups of Coffee Per Day

Multiple Choice

Nathan drinks three cups of coffee per day.The marginal benefit that he enjoys from drinking the third cup is

A) less than the marginal benefit that he receives from drinking the second cup.
B) the same as the total benefit from drinking all three cups minus the total benefit of drinking the first two cups.
C) both a and b.
D) greater than the marginal benefit that he receives from drinking the second cup.
E) none of the above.