Suppose the Price of Gasoline Increases Rapidly,and That Consumers Respond

Suppose the price of gasoline increases rapidly,and that consumers respond by buying a smaller quantity of gasoline.The consumer price index

A) reflects this price increase accurately.
B) understates the price increase due to the so-called income bias.
C) overstates the price increase due to the so-called income bias.
D) overstates the price increase due to the so-called substitution bias.