prep2007 cr2 15求解

uneverknow777

15.(25986-!-item-!-188;#058&002914)



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?





(A) In some countries it is not illegal for a company to drive away competitors by selling a product below cost.

(B) 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.

(C) As part of promotions designed to attract new customers, airlines sometimes reduce their ticket prices to below an economically sustainable level.

(D) On deciding to stop serving particular routes, most airlines shift resources to other routes rather than reduce the size of their operations.

(E) When airlines dramatically reduce their fares on a particular route, the total number of air passengers on that route increases greatly.

答案是B，结论应该是 this method of eliminating competition cannot be profitable in the long run，B选项怎么会是削弱呢，哪位帮忙解释一下，谢谢！

uneverknow777

candyloun

题中说的是降价不是长久之计因为可能给新对手可乘之机，问如何削弱。答案选项说的是 既然航空公司主管能通过降价的方式消灭现在的对手，当新对手出现的时候他还能用降价的方式赶走新对手，所以题目中关于新对手有可乘之机的说法遭到了削弱。