大全一题，没有思路， 请NN指教

1.        
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（C）

(E) that they should
have sympathy for

grounds for doing(或者名词）

这个是外国教科书里经常出现的～～