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Q20:
Community activist: If Morganville wants to keep its central shopping district healthy, it should prevent the opening of a huge SaveAll discount department store on the outskirts of Morganville. Records from other small towns show that whenever SaveAll has opened a store outside the central shopping district of a small town, within five years the town has experienced the bankruptcies of more than a quarter of the stores in the shopping district.
The answer to which of the following would be most useful for evaluating the community activist’s reasoning?
- Have community activists in other towns successfully campaigned against the opening of a SaveAll store on the outskirts of their towns?
- Do a large percentage of the residents of Morganville currently do almost all of their shopping at stores in Morganville?
- In towns with healthy central shopping districts, what proportion of the stores in those districts suffer bankruptcy during a typical five-year period?
- What proportion of the employees at the SaveAll store on the outskirts of Morganville will be drawn from Morganville?
- Do newly opened SaveAll stores ever lose money during their first five years of operation?
Can anyone explain the correct answer? And why B is wrong? | 
