NO.PZ201712110200000110
问题如下：
During economic expansions, monetary authorities raise benchmark rates to help control inflation. This action is most often consistent with:
选项：
A.bearish flattening.
bullish steepening.
bearish steepening.
解释：
A is correct. This action is most often consistent with bearish flattening, or short-term bond yields rising more than long-term bond yields resulting in a flatter yield curve.
您好，我不太明白这题目为什么不选择C，因为monetary policy适合于短期，短期的利率变动大于长期，
以及答案中的三种情况对应什么关键词就可以选择，请问有总结吗?
