【求助prep一道语法164】

水色青空

164. (33751-!-item-!-188;#058&007036)
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, representingD




答案选D
A选项中的分词修饰对象不清楚，我想请问的是现在分词短语在句尾，它的修饰对象是谁呢？

水色青空

顶~~