Assume that a consumer has a given budget or income of $10 and that she can buy only two goods, apples or bananas. The price of an apple is $1.00 and the price of a banana is $0.50. For this consumer, the opportunity cost of buying one more apple is

Multiple Choice

A. 0.5 of a banana.

B. 0.1 of a banana.

C. 1 banana.

D. 2 bananas.