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The vast consolidation within the rail industry means that most shippers are served by only one rail company. Railroads typically charge such “captive” shippers 20 to 30 percent more than they do when another railroad is competing for the business. Shippers who feel they are being overcharged have the right to appeal to the federal government’s Surface Transportation Board for rate relief, but the process is expensive, time-consuming, and will work only in truly extreme cases.
It can be inferred from Paragraph 3 that ________.
[A] shippers will be charged less without a rival railroad
[B] there will soon be only one railroad company nationwide
[C] overcharged shippers are unlikely to appeal for rate relief
[D] a government board ensures fair play in railway business
长难句解析：
It can be inferred from Paragraph 3 that ________.
[A] shippers will be charged less without a rival railroad
比较结果和原文相反。不选!
[B] there will soon be only one railroad company nationwide
多数客户由一家公司提供服务，不能说只有一家公司。
[C] overcharged shippers are unlikely to appeal for rate relief
but the process is expensive, time-consuming, and will work only in truly extreme cases.
这就是出题人接受的正话反说!正确答案!
[D] a government board ensures fair play in railway business
Ensure这个词在原文中没有对应信息。