GWD25-Q37

37. GWD25-Q37.（不懂）

Though the law will require emissions testing of all diesel vehicles, from
        tractor trailers to excursion buses, it will have no effect on sport utility
        vehicles, almost all of which are gasoline powered, and will not be subjected to emissions-control standards as stringent as they are for
        diesel-powered vehicles.

A.       powered, and will not be subjected to emissions-control standards as stringent as they are for

B.        powered, and therefore not subjected to emissions-control standards
        that are as stringent as those of

C.       powered and therefore not subject to emissions-control standards as stringent as those for

D.       powered, which are not subject to emissions-control standards as
        stringent as they are for

E.        powered and therefore they are not subject to emissions-control
        standards as stringent as those of

答案是c请问  ，and与and有区别吗？这题其它答案有何错误啊？

A,B (and  ) parallel with (it), wrong meaning.

D, they predict " vehicles

E, "they "cause run-on.

standard for

注意代词的指代问题

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