请教947大全190

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By showing that South Africa does not have a free market and is in fact a kind of collectivist welfare state for Whites only, Sowell argues that American conservatives have no valid ideological grounds to be in sympathy with the Pretoria regime.

(A) to be in sympathy with

(B) to sympathize with

(C) for sympathizing with

(D) that they should sympathize with

(E) that they should have sympathy for

答案c

请问为什么不能b呢？

查过字典好像也有have grounds to do 这个搭配

请问跟grounds for sth 有什么差别呢？