OG11-20

20.   Based on accounts of various ancient writers, scholars have painted a sketchy picture of the activities of an all-female cult that, perhaps as early as the sixth century BC, worshipped a goddess known in Latin as Bona Dea, “the good goddess.”

(A) Based on accounts of various ancient writers

(B) Basing it on various ancient writers’ accounts

(C) With accounts of various ancient writers used for a basis

(D) By the accounts of various ancient writers they used

(E) Using accounts of various ancient writers

选E没有问题。但B的解释：The pronoun it does not have a clear reference

             it为何不可以指代“a sketchy picture” ？ 

逻辑上，it应该指代“学者画概图”这件事，语法上it指代"a sketchy picture of ...cut"。