Suppose There Are Only Two Goods, Apples and Oranges

Multiple Choice

Suppose there are only two goods, apples and oranges. What happens if the price of each good increases by 15 percent?

A) The consumer will substitute apples for oranges.
B) The consumer will substitute oranges for apples.
C) There is no substitution effect because relative prices have remained constant.
D) Demand for both goods increases.
E) Demand for both goods decreases.