单选题 According to the quantity theory of money, which one of the following economic variables would change in response to an increase ha the supply of money?

A. Price level.
B. Real income.
C. Velocity.

【正确答案】 A

【答案解析】MV = PY, where V and Y are assumed to be constant. If the money supply is increased then it would follow that P, the price level, would increase.