Which of the Following Statements Is Correct

Which of the following statements is correct?

A) The income effect analyzes the effect of a change in a consumer's purchasing power as a result of a price change, holding constant the consumer's money income.
B) The income effect refers to the fact that when a consumer's income increases, the consumer will buy more normal goods and less inferior goods.
C) The income effect analyzes the effect of a change in a consumer's money income, holding constant the consumer's purchasing power.
D) The income effect explains why a price change causes the entire demand curve to shift to the right or to the left.