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【单选题】
In many parts of the United States when Wal-Mart opens a new store, some smaller retailers go out of business. One of the reasons for this development could be that:A.
Wal-Mart practices unfair pricing methods that reduce consumer surplus over time.
B.
consumers in those areas receive no consumer surplus from Wal-Mart.
C.
consumers in those areas receive a larger consumer surplus from shopping at Wal-Mart than from the smaller stores.
D.
smaller stores increase prices to compete.
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举一反三
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