Q7:

Although the discount stores in Goreville’s central shopping district are expected to close within five years as a result of competition from a SpendLess discount department store that just opened, those locations will not stay vacant for long.  In the five years since the opening of Colson’s, a nondiscount department store, a new store has opened at the location of every store in the shopping district that closed because it could not compete with Colson’s.

Which of the following, if true, most seriously weakens the argument? 

1. Many customers of Colson’s are expected to do less shopping there than they did before the SpendLess store opened.
2. Increasingly, the stores that have opened in the central shopping district since Colson’s opened have been discount stores.

3. At present, the central shopping district has as many stores operating in it as it ever had.
4. Over the course of the next five years, it is expected that Goreville’s population will grow at a faster rate than it has for the past several decades.
5. Many stores in the central shopping district sell types of merchandise that are not available at either SpendLess or Colson’s.

隐含的条件是discount store一定比nondiscount store更容易生存吗？对于这道题给的条件，我完全建立不起逻辑联系。。。恳请大牛指点迷津~

错位竞争的问题

C是不打折的商店

结论说因为竞争不过C，所有商店都关门。

B说的是，打折商店都在开门，不是every store都关门