Which of These Internet Approaches Is LEAST Likely to Succeed

Which of these Internet approaches is LEAST likely to succeed?

A) Online-only retailer Amazon differentiates its offering by being more efficient than its competitors.
B) Multichannel retailer Williams-Sonoma uses its Web site to complement its stores and catalogs.
C) Catalog operator L.L. Bean uses its Web site to focus on the specific needs of targeted customers.
D) Large chain operator Target uses its Web site to supplements its stores and other promotion.
E) All of the above is(are) valid approaches and likely to succeed.