Domestic automobile manufacturers have invested millions of dollars into research to develop cards more gasoline-efficient even than presently on the road.
(A) Same
(B) into research for developing even more gasoline-efficient cards on the road than at present
(C) for research for cars to be developed that are more gasoline-efficient than presently the road
(D) in research to develop cards 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
(D) is the correct answer but please help me understand the following: -
(A) (B) and (C) are out because Invested in is the better construction. In (E) I understand presently is not parallel to gas-efficient. But in which cases should one prefer the infinitive ('to develop') over participle ('for developing').