OG2020-707求解！

陶森特的鸟布 · 发表于 2020-4-8 22:55:32

Fast-food restaurants make up 45 percent of all restaurants in Canatria. Customers at these restaurants tend to be young; infact, studies have shown that the older people get, the less likely they are to eat in fast-food restaurants, Since the average age of the Canatrian population is gradually rising and will continue to do so, the number of fast food restaurants is likely to decrease. Which of the following, if true, most seriously weakens the argument ?
A.Fast-food restaurants in Canatria are getting bigger, soeachone can serve more customers.
B.Some older people eat at fast-food restaurants more frequently than the average young person.
C.Many people who rarely eat infast-food restaurants nevertheless eat regularly in restaurants.
D.The overall population of Canatria is growing steadily.
E.As the population of Canatria gets older,more people are eating at home.
答案是D，我在想a为什么不能理解成他因削弱，题目逻辑是平均年龄增加，导致快餐厅变少了，A提出了一个快餐厅变少的另一个原因

陶森特的鸟布 · 发表于 2020-4-8 22:59:44

weakens the argument到底指削弱reasoning还是conclusion

陶森特的鸟布 · 发表于 2020-4-8 23:18:01

我大概想了想，题目说平均年龄增加，导致未来快餐厅变少，因为这个是未来的事情，a虽然提出了他因，并不影响平均年龄增加作为导致未来快餐厅变少的原因（之一）；所以他因削弱是建立在已经发生的事情上，不知道我这么理解对不对

小小豆豆酱 · 发表于 2020-4-10 21:12:49

A的逻辑链：餐厅变大→每个餐厅可以容纳更多的人→快餐店数量减少，问题出在第二个→这里，题目中并没有给出每个餐厅可能容纳更多的人一定会导致快餐店数量减少，这里题主可能引入了主观因素。

OG2020-707求解！

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