prep2-11

11.        (25059-!-item-!-188;#058&002009)

Nine months after the county banned jet skis and other water bikes from the tranquil waters of Puget Sound, a judge overturned the ban on the ground of violating state laws for allowing the use of personal watercraft on common waterways.

(A) of violating state laws for allowing

(B) of their violating state laws to allow

(C) that it violates state laws that allowed

(D) that it violated state laws allowing

(E) that state laws were being violated allowing
        

请问d中it是否有指代不清的嫌疑

还是属于形式主语

答案d 请nn帮忙解答疑惑