单选题 Assume that the reserve requirement is 20 percent and banks currently have no excess reserves. If excess reserves stay at zero and the Federal Reserve buys $100 million of Treasury bills from the public, the money supply would increase by:

A、

A. $20 million.
B、

B. $100 million.
C、

C. $500 million.

【正确答案】 C

【答案解析】