Compatible Size!

[gmat_perfect]

Diesel engines burn as much as 30 percent less fuel than gasoline engines of comparable size, as well as emitting far less carbon dioxide gas and far fewer of the other gases 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 gases that have
(B) of comparable size, as well as emit far less carbon dioxide gas and far fewer of the other gases having
(C) of comparable size, and also they emit far fewer carbon dioxide and other gases that have
(D) that have a comparable size, and also they emit far less carbon dioxide gas and other gases that have
(E) that have a comparable size, as well as emitting far fewer carbon dioxide and other gases having

[spoiler]OA: A[/spoiler]

[reply2spg]

3/2 split 'of/that' and 'as well as' vs 'and also'

and also is wrong C and D are out. We need quantity of carbon dioxide emission. Quantity is uncountable E is out.

between A and B, 'having' is passing, B out

Ans A.

Diesel engines burn as much as 30 percent less fuel than gasoline engines of comparable size, as well as emitting far less carbon dioxide gas and far fewer of the other gases 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 gases that have
(B) of comparable size, as well as emit far less carbon dioxide gas and far fewer of the other gases having
(C) of comparable size, and also they emit far fewer carbon dioxide and other gases that have
(D) that have a comparable size, and also they emit far less carbon dioxide gas and other gases that have
(E) that have a comparable size, as well as emitting far fewer carbon dioxide and other gases having

[spoiler]OA: A[/spoiler]