题目选项分析

One automobile manufacturer has announced plans to increase the average fuel efficiency of its sport utility vehicles by 25 percent over the next five years, which is an increase amounting to roughly five miles per gallon, representing the first significant change in the fuel efficiency of any class of passenger vehicle in almost two decades.

One automobile manufacturer has announced plans to increase the average fuel efficiency of its sport utility vehicles by 25 percent over the next five years, an increase that would amount to roughly five miles per gallon and would represent the first significant change in the fuel efficiency of any class of passenger vehicle in almost two decades.