请教两道语法!!多谢!!!

以下是引用icecreamr在2003-10-21 22:19:00的发言：
1: In presenting his modus vivendi proposal, Lansing implied that the American government accepted the German view that armed merchant vessels were warships: however, (when the proposal was dropped by the Wilson administration, it )seemed to be reverting to the British view on this question.
(A) when the proposal was dropped by the Wilson administration, it
(B) after it was dropped, the Wilson administration
(C) by dropping the proposal, the Wilson administration
(D) the Wilson administration dropped the proposal when it
(E) when they dropped the proposal, the Wilson administration
这道题我做了好几遍了，这次还是做错。呵呵。意思是wilson administration在drop这个propossal的时候，使这个东西听上去和前面的american gov.的态度相反。我开始选A,A那个it不能用，不确定指的是什么。ets很忌讳这个。

2: 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 )occurred.
(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
(C) regarding the budgetary deficit, an unanticipated rise in interest rates have
(D) on the deficit, an unanticipated rise in interest rates have
(E) regarding the deficit, an unanticipated rise in interest rats have
这个题目，从单复数上看，an unanticiated rise应该对应has,AB里面选，position on the deficit就足够表示他的意思了，没有必要加上in regard to,何况我怀疑这个词组用法也未必对。
希望能帮到你。

答案 1 C
        2 B
能讲讲为什么吗?还有这两句的意思.多谢!!!