prep一道weaken难题，求解答！

小目标750

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.

这道题答案是B， 我选了D。


看了很多网上对于这道题的讨论， 但还是没有很懂。


我的问题是： "what is the argument?"  
argument是  “However, this method of eliminating competition cannot be profitable in the long run.”  ？？        还是最后一句“. 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.”？？


做题时我认为argument是“However, this method of eliminating competition cannot be profitable in the long run.” ，   weaken the argument 就是找答案 说明 this method.... can be profitable in the long run.所以我选了D，  大多数航空公司决定关闭这条航线， 因此打价格战的公司占领整个市场， 可以实现 profitable in the long run   ；  而选项B  如果新的竞争者进入， 航空公司还要打价格战， 降价到甚至亏损，不能实现profitable in the long run.。


跪求明白的大神或者小伙伴们可以讲讲这道题！！感谢啊！

HoganTong

lz对B选项的理解跑偏了，这个题可能经济学专业的人读起来逻辑是比较通顺的。B选项不是说新的竞争者再来就要继续打价格战，而是说只要你打过一次价格战，别人就知道你是“一条疯狗”，来人就咬，所以就不来了。只要你打过一次价格战，别人就知道你会不计成本用这个方法驱赶竞争者，以后就没有新人来跟你抢了。

小目标750

HoganTong 发表于 2019-4-9 09:20
lz对B选项的理解跑偏了，这个题可能经济学专业的人读起来逻辑是比较通顺的。B选项不是说新的竞争者再来就要 ...

感谢回复！
所以说选项B的 意思是  只要有新的竞争者来， 该公司就会打价格战， 那么该公司可以长期垄断这个市场， 可以实现长期盈利， 我理解的对不？  
还想请教下， 这道题的argument 是不是  “However, this method of eliminating competition cannot be profitable in the long run.”  ？
选项D你是怎么理解的呢？
感谢感谢！

HoganTong

小目标750 发表于 2019-4-9 09:46
感谢回复！
所以说选项B的 意思是  只要有新的竞争者来， 该公司就会打价格战， 那么该公司可以长期垄断 ...

没错，就是这个意思，B选项是说打过一次价格战就具备了威胁，没人会来跟你竞争找不痛快了。

你是想问conclusion吧？argument=premise+conclusion
这道题的conclusion是“However, this method of eliminating competition cannot be profitable in the long run.”

D是一个没有什么误导性的无关选项。

小目标750

HoganTong 发表于 2019-4-9 10:46
没错，就是这个意思，B选项是说打过一次价格战就具备了威胁，没人会来跟你竞争找不痛快了。

你是想问con ...

明白了！  感谢