Which of the Following Statements About Zappos Is Most Accurate

Which of the following statements about Zappos is most accurate?

A) Zappos limits its inventory to an extensive selection of high end fashion footwear.
B) Zappos carries more than 1,000 different brands of shoes with over 3 million products.
C) Zappos can guarantee over-night shipping to all its customers because the customers know ahead of time they will be charged for express service.
D) Zappos is so successful because it has chosen a single mission "sell shoes and nothing else."
E) Zappos offers a 30/60/90 day return policy whereby refunds are based on how long you've had the shoes.