One Reason for the Growth of Cyber Monday and Online

One reason for the growth of Cyber Monday and online shopping in general is

A) Internet shopping is safer since no one can access your personal information.
B) people feel they won't be tempted to overspend online the way they do in traditional stores.
C) many retailers now move their Friday in-store sales and promotions to their Web sites on Monday.
D) people know that if they purchase online they will automatically get tons of offers from similar online merchants.
E) online prices are traditionally lower since it is so easy to "shop the competition."