【单选题】Jason buys only music downloads and food with his weekly income. In response to a decrease in the price of downloads, he buys more downloads and less food. As a result, we would expect:
A.
the marginal utility of downloads to increase and the marginal utility of food to decrease.
B.
the marginal utility of both downloads and food to remain unchanged.
C.
the marginal utility of downloads to decrease and the marginal utility of food to increase.