哪位聪明的孩子给我解释一下这道题 center

mirabelle9042

The spread between the yield on 10-year government bonds and the overnight bank lending rate has decreased from 300 basis points to 200 basis points. As an economic indicator, this most likely suggests that the business cycle:

A) has passed a trough.

B) has entered a contraction.

C) is approaching a peak.

为什么选C？