请教NN们一道关于base on的题。

marque

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 B.C., 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,

答案选A，想请教大虾们：
1，OG上解释说B的basing it on 中，it 指代不明， 我不明白它为什么指代不清；
2，D中，using accounts of 是什么含义哦，看起来好awkward额 ，
感激不尽，望解答.....

marque

Sry 4 that, 答案选E，想请教大虾们：
1，OG上解释说B的basing it on 中，it 指代不明， 我不明白它为什么指代不清；
2，E中，using accounts of 是什么含义哦