1. 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（D）
(E) in research for developing cars that are even more gasoline-
efficient than presently on the road
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