请教大牛GWD-TN-23-Q28的答案？谢谢了！！！

Q28: PP58.

Diesel engines burn as much as 30% less fuel than gasoline engines of comparable size, as well as emitting far less carbon dioxide gas and far fewer of the other gasses that have been implicated in global warming.

A.      of comparable size, as well as emitting far less carbon dioxide gas and far fewer of the other gasses that have

B.       of comparable size, as well as emit far less carbon dioxide gas and far fewer of the other gasses having

C.       of comparable size, and also they emit far fewer carbon dioxide and other gasses that have

D.      that have a comparable size, and also they emit far fewer of the other gasses having

E.       that have a comparable size, as well as emitting far fewer of the other gasses having

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我觉得选B吧。C、D不对，因为they指代不清；emit和burn并列，所以选B。不知道对否？