为啥不选A

问题如下：

The Great Financial Crisis (GFC) started

选项：

A.

with the failure of Lehman Brothers

B.

in the high-tech sector

C.

in the subprime mortgage market

解释：

C is correct. in the subprime mortgage market

The cascade of events that came be known as the Great Financial Crisis of 2007-2009 (GFC) began with a downturn in the US subprime mortgage market in the summer of 2007.