prep一道语法题求救~

呼啦啦嘿嘿哈

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  

其中C，D中的it指代什么呀~~ 谢谢~~

pigman007

指代ban

jannyguo

the ban