基本竞争战略包括（）

A.稳定战略

B.发展战略

C.成本领先战略

D.差异化战略

E.重点集中化战略

When Brad offered his old wooden desk at a garage sale, no one bought it, even though he offered it for only $10. When he offered it at the local auction house, however, someone bought it for $850.
Which of the following, if true, best explains why Brad was able to sell the desk for a high price at the auction while he could not sell it for a much lower price at the garage sale ？（）

A. Brad advertised that the proceeds of the garage sale would benefit a local charity, while he made no such claims for the proceeds from the auction.

B. One of the legs of the desk was shorter than the other three, producing an unbalanced writing surface.

C. The auction house specializes in selling antique furniture, which is generally valued more highly than the discarded furniture sold at garage sales.

D. Brad insisted that anyone who bought the desk had to use it as an actual workspace.

E. Prospective buyers at auctions are often more interested in the auction process than in the items up for bid.