请帮忙看GWD 11 11

Q11:

Retailers reported moderate gains in their November sales, as much because of their sales of a year earlier being so bad as that shoppers were getting a head start on buying their holiday gifts.

A.      of their sales of a year earlier being so bad as that

B.       of their sales a year earlier having been as bad as because

C.       of their sales a year earlier being as bad as because

D.      their sales a year earlier had been so bad as because

E.       their sales of a year earlier were as bad as that

前辈们说选D，可是我根本没看明白这个话

请指点迷津

as much because A as because B

A - their sales (a year earlier) had been so bad

B - 整个后部未划线部分

A/B都是句子，结构平行；A中的had been过分结构时态正确。

非常感谢斑竹的答复

懂了一个知识点

這題

Retailers reported moderate gains in their November sales, as much because of their sales of a year earlier being so bad as that shoppers were getting a head start on buying their holiday gifts.

答案沒問題

据零售商说，较之去年同期差劲的情况，十一月的销售有适度上扬，其原因是消费者提前购买节日礼物。