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题库 / Prep2007E2-CR-15
Some airlines allegedly reduce fares on certain routes to a level at which they lose money, in order to drive competitors off those routes. However, this method of eliminating competition cannot be profitable in the long run. Once an airline successfully implements this method, any attempt to recoup the earlier losses by charging high fares on that route for an extended period would only provide competitors with a better opportunity to undercut the airline's fares.
Which of the following, if true, most seriously weakens the argument?
In some countries it is not illegal for a company to drive away competitors by selling a product below cost.
Airline executives generally believe that a company that once underpriced its fares to drive away competitors is very likely to do so again if new competitors emerge.
As part of promotions designed to attract new customers, airlines sometimes reduce their ticket prices to below an economically sustainable level.
On deciding to stop serving particular routes, most airlines shift resources to other routes rather than reduce the size of their operations.
When airlines dramatically reduce their fares on a particular route, the total number of air passengers on that route increases greatly.
结论句：However, this method of eliminating competition cannot be profitable in the long run.
b选项 ：Airline executives 就是指这家航空公司的行政领导。竞争者出现时，就再一次使用低价策略挤出竞争者；没有竞争者时就用高价来赚取利润…….
这个方法可以在挤出竞争者同时定高价 be profitable，削弱结论
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