Which of the following most logically completes the argument?
Researchers recently asked dozens of shoppers, chosen at random coming out of a FoodBasket supermarket, what they had purchased. The prices of the very same items at the nearest ShopperKing supermarket were totaled and compared with the FoodBasket total. The ShopperKing totals averaged five percent higher than the FoodBasket totals. Nevertheless, this result does not necessarily show that shoppers at ShopperKing would save money overall by shopping at FoodBasket instead, since ______.
- shoppers who shop regularly at a given supermarket generally choose that store for the low prices offered on the items that they purchase most often
- for shoppers with more than 20 items, the ShopperKing totals averaged more than five percent higher than the FoodBasket totals
- many shoppers consider factors other than price in choosing the supermarket at which they shop most regularly
- there is little variation from month to month in the overall quantity of purchases made at supermarkets by a given shopper
- none of the people who conducted the research were employees of the FoodBasket supermarket
这个题目本来选A， 后来想了想好像要选C。 但是我的理解好像和其他的NN理解不同类。我觉得C说顾客选商品的时候除了价格以外考虑的其他的因素，因此说在调查中的顾客的选择并没有代表价格的最低，而是综合其他一些具体的因素，而问题是说：save the money， 所以就削弱了结论，不能从这个调查来选择商场。
A则是说明调查中的顾客本来就是按照最低价格选择商场，所以是加强了。
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