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23.In January of last year the Moviemania chain of movie theaters started propping its popcorn in canola oil, instead of the less healthful coconut oil that it had been using until then. Now Moviemania is planning to switch back, saying that the change has hurt popcorn sales. That claim is false, however, since according to Moviemania’s own sales figures, Moviemania sold 5 percent more popcorn last year than in the previous year.
Which of the following, if true, most strongly supports the argument against Moviemania’s claim?
- Total sales of all refreshments at Moviemania’s movie theaters increased by less than 5 percent last year.
- Moviemania makes more money on food and beverages sold at its theaters than it does on sales of movie tickets.
- Moviemania’s customers prefer the taste of popcorn popped in coconut oil to that of popcorn popped in canola oil.
- Total attendance at Moviemania’s movie theaters was more than 20 percent higher last year than the year before.
- The year before last, Moviemania experienced a 10 percent increase in popcorn sales over the previous year.
给的答案是A，但我觉得A不能有力支持“产品的改变没有减少销售业绩”的观点。
1）新爆米花销售同比增长5％，
2）零食类总的销售同比增长低于5％
两个条件并不能说明新产品比老产品就是销量好。因为也许爆米花本是这个影院销售收入中的强档产品，增长率一直很高，比如几年来一直都是增长10％的，远远高于其他单个零食销量，但因为新产品的推出，销售增长变成了5％，其实对收入的贡献是降低了，在这种情况下应该是支持了影院的立场。
所以A是个模糊条件，可支持也可削弱，不知道是否有道理？ | 
