单选题 The quantity theory of money states that: A. a decrease in the money supply will cause a proportional increase in prices. B. monetary and fiscal policy must be used in tandem. C. an increase in the money supply will cause a proportional increase in prices.

【正确答案】 C

【答案解析】The quantity theory is in no way related to fiscal policy. Money supply multiplied by velocity must equal nominal gross domestic product (GDP).