76. Retailers reported moderate gains in their November sales, as much because of their sales of a year earlierbeing 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
为什么说B,C 的结构导致不正确的比较了their sales 和 shoppers were getting ... | 
