The implementation of new automobile-efficiency standards in America will most likely result in A. more oil consumption
B. fewer miles per gallon (mpg)
C. less air pollution
D. more carbon dioxide emissions

The implementation of new automobile-efficiency standards will result in less air pollution.

Explanation:

A is not correct because one of the purposes of these standards is that they reduce oil consumption.

B is not correct because these standards will enable the vehicles to drive more miles per gallon.

C is correct because having vehicles that spend less oil and drive larger distances with less will result in a reduction of air pollution.

D is not correct because the carbon dioxide emissions will reduce, not increase.