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