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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.
mark一下，B选项如果把前面的“Airline executives generally believe that”拿掉，就是一个无关选项了。你到底降不降和题目没有关系，关键是要往竞争者怕了，不会再有人进来竞争了这个方向引。
而且文章其实讲得很清楚了However, this method of eliminating competition cannot be profitable in the long run. 说的是这种消除竞争者的策略无利可图，所以削弱肯定还是要从消除竞争者这个点出发。而E仅仅证明了消除竞争者中用到的降价策略有利可图，并不能证明消除竞争者策略有利可图，
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