please explain why B is wrong. TIA
source - gmatclub
Toys4Them, an online toy merchant, generated $220 million in revenue last year, an 8.6 percent increase over the previous year. However, the number of toys sold did not increase significantly last year over the previous year.
Each of the following, if true, could explain the apparent discrepancy EXCEPT:
a)Last year, Toys4Them changed its accounting policy to no longer count toys given away to charities as sold toys.
b)Toys4Them sold a higher proportion of more expensive toys last year than the previous year.
c)Last year, the number of consumers shopping for toys increased over the previous year.
d)Last year, Toys4Them experienced an unprecedented boom in its divisions that do not sell toys.
e)Because of an economic downturn, Toys4Them heavily discounted its toys during the holiday season two years ago.