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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.
C：this method eliminating competition cannot be profitable in the long run.？
要能够用b答案来削弱文章结论的话，要看懂后面的部分，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.说如果进行另外的收费来补偿之前的降价，那么就会有其他竞争者的出现。
从这里来削弱，B选项中说每一次竞争者的出现都可以用降价的形式来eliminate，那么in the long term，竞争者就一直会被这种方法来eliminate，所以应该是可以受益的。从而削弱了文章结论。
这道题的conclusion 是题目中提到价格战的方法不是longrun profitable。（因为这样的价格战本身是lose money的，一旦之后想要提价别人就会用同样的价格战来diss你。）
可是我觉得B也不太能理解啊… 如果每次新对手出现他都能用价格战那不是总是在lose money吗，怎么weaken 结论说价格战的方法不是longrun profitable ？？
方案推理题。
目标：drive C off those routes
方案：reduce fares
文章中前提说了这方案不能长期用，不然亏本，而且想提价回本的话，对手也会降价。
答案要跟方案有关系，我的理解是B选项说只要有新对手出现，那用过reduce的就要再用，那每次出现新对手都会亏本，不断出现新对手是个长期的事情，那公司长期会亏本。所以这个方案不能用。
首先，weaken不是針對結論【long term 是否 profitable？】而是針對reasoning，也就是價格戰時，別人殺進來我是不是就不能應對了？。所以只要找到證據說明我有實力應對即可。對不？～
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