GMAT Sentence Correction (SC) | Re: Retailers reported moderate gains in their November sales

Retailers reported moderate gains in their November sales, as much becauseof 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 -- Parallelism issue -- as much because .. as that and usage of being , Sales of a year is wrong
B. of their sales a year earlier having been as bad as because -- As bad as -- the comparison element is missing , having been is awkward
C. of their
...

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