prep1-164

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, amounting to roughly five miles per gallon, and representing the first significant change in the fuel efficiency of any class of passenger vehicle in almost two decades.

(A) amounting to roughly five miles per gallon, and representing

(B) amounting to roughly five miles per gallon, and it would represent

(C) an increase that would amount to roughly five miles per gallon and it would represent

(D) an increase that would amount to roughly five miles per gallon and would represent

(E) which is an increase amounting to roughly five miles per gallon, representing

笔记上解释C错误时说and it would represent在语法上与主句并列,如果与主句并列and前不是应该加逗号么?

LIU4949 GG,这点我是知道的,我只是觉得如果我是说如果笔记上说的and it would represent在语法上与主句并列是成立的,那么and 前也应该加逗号吧

C是it指代不清的问题，比较选项C和D的话，D比较好