20. Because of the business community 's uncertainty about the President's position in regard to the issue of the budget deficit, an unanticipated rise in interest rates has occured.
(A)in regard to the issue of the budget deficit, an unanticipated rise in interest rates has (B)on the deficit, an unanticipated rise in interest rates has
the answer is B. B看上去比A简洁,但是它丢掉budget, 不是说不能改变原来的意思吗?因为我们可以说budget deficit, trade deficit, or others. 有没有其它的观点?