unemployment and crime are high it can be assumed that the latter is due to the former

问题补充：

unemployment and crime are high, it can be assumed that the latter is due to the former.

A. Before

B. Where

C. Unless

D. Until

答案：

A. Before

(答案→)B. Where

C. Unless

D. Until

解析：句意：哪里失业人数多，犯罪就高。可以确定后者是由前者决定的。Before在……之前 Where在哪里 Unless除非Until到……为止，选B。