Guidebook writer: I have visited hotels throughout the country and have noticed that in those built before 1930 the quality of the original carpentry work is generally superior to that in hotels built afterward. Clearly carpenters working on hotels before 1930 typically worked with more skill, care, and effort than carpenters who have worked on hotels built subsequently. Which of the following, if true, most seriously weakens the guidebook writer’s argument? - The quality of original carpentry in hotels is generally far superior to the quality of original carpentry in other structures, such as houses and stores.
- Hotels built since 1930 can generally accommodate more guests than those built before 1930.
- The materials available to carpenters working before 1930 were not significantly different in quality from the materials available to carpenters working after 1930.
- The better the quality of original carpentry in a building, the less likely that building is to fall into disuse and be demolished.
- The average length of apprenticeship for carpenters has declined significantly since 1930.
这题答案给的是D，小妹甚是不解，感觉D和本题根本就妹关系，求助
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?
这倒题也甚是不解阿。。。。。 | 
