Daniel Zimiles Will Buy More and More Baseball Cards Until

Multiple Choice

Daniel Zimiles will buy more and more baseball cards until

A) the total utility of cards begins to fall.
B) the total utility of the cards falls to zero.
C) the marginal utility of the cards starts to fall.
D) the marginal utility of the cards falls to the price of the cards.
E) the marginal utility of the cards falls to zero.