单选题 U.S. banks will generally opt to hold excess reserves if they believe general business conditions in the U.S. economy are subject to greater uncertainty. If all else is held constant, what is the most likely impact of this action?

A. The money supply will decrease.
B. The money supply will increase during a period of inflation, but will decrease if the economy goes into a recession.
C. There will be no effect on the money supply.

【正确答案】 A

【答案解析】If banks choose to hold excess reserves, they will decrease their lending. Less bank lending will cause the money supply to decrease.