NO.PZ2023061903000076
问题如下：
Q. A prolonged period of an official interest rate very close to zero without an increase in economic growth most likely suggests:
选项：
A.quantitative easing must be limited to be successful.
B.the effectiveness of monetary policy may be limited.
C.targeting reserve levels is more important than targeting interest rates.
解释：
B is correct. A central bank would decrease an official interest rate to stimulate the economy. The setting in which an official interest rate is lowered to zero (or even slightly below zero) without stimulating economic growth suggests that there are limits to monetary policy.
C选项为什么不对呢???
