求教两道白勇语法上关于分词和不定式的题

以下是引用ashram在2007-5-27 18:13:00的发言：
1.Once the economic and social usefulness of the motor card was demonstrated and with its superiority to the horse
being
 

proved, much of the early hostility to it in rural regions disappeared.
(A) and with its superiority to the horse being
(B) and its superiority over the horse had been
(C) and its superiority to the horse
(D) its superiority over the horse
(E) with its superiority to the horse having been
白勇的答案是B，我觉得从并列句式考虑，应该选C才对，B用了had been，跟前面的was demonstrated不对称啊







2.Domestic automobile manufacturers have invested millions of dollars into research to develop cars more
gasoline-efficient even than presently on the road

.
(A) into research to develop cars more gasoline-efficient even than presently on the road
(B) into research for developing even more gasoline-efficient cars on the road than at present
(C) for research for cars to be developed that are more gasoline-efficient even than presently on the road
(D) in research to develop cars even more gasoline-efficient than those at present on the road
(E) in research for developing cars that are even more gasoline-efficient than presently on the road
白勇的答案是D
我觉得选项E中，for developing......用来修饰research,为什么不可以呢？


希望牛牛们指点！