请问补充250题67题

67.   According to some economists, Japan is in danger of plunging into a depression that, with double-digit unemployment, could severely strain a society that regards lifetime employment as a virtual right of citizenship.

(A) that, with double-digit unemployment, could severely strain

(B) that, because of double-digit unemployment, could be a severe strain for

(C) with double-digit unemployment, and it could severely strain

(D) with double-digit unemployment and could be a severe strain（A）

(E) with double-digit unemployment and could severely strain

Key is A. But why  C is not true by using it to refer to "depression"?

与正确选项相比，的确C比较罗索，而且it有指代不清的嫌疑。

谢谢!