og13中的小问题！

lihong54

   13。State officials report that soaring rates of liability insurance have risen to force cutbacks in the operations of everything from local governments and school districts to day-care centers and recreational facilities.

(A) rates of liability insurance have risen to force

(B) rates of liability insurance are a force for

(C) rates for liability insurance are forcing

(D) rises in liability insurance rates are forcing

(E) liability insurance rates have risen to force

        如何在B和C中确定正确答案呢？og解释中说：In choices A and B, rates of
        is incorrect; when rates means “prices charged,” it should be followed by for.  "prices charged"是什么意思啊？为什么这种情况下，rates后面要加for?

yoko87

ding!!!同问