A Consumer Has Been Buying 4 Magazines and 3 Books

A consumer has been buying 4 magazines and 3 books a month for many months. The price of magazines then decreases, which directly causes the marginal utility per dollar spent on

A) magazines to increase, thereby inducing the consumer to purchase fewer magazines and more books.
B) magazines to increase, thereby inducing the consumer to purchase more magazines and fewer books.
C) books to increase, thereby inducing the consumer to purchase fewer magazines and more books.
D) books to decrease, thereby inducing the consumer to purchase fewer magazines and more books.