Question ID:PT50 S4 Q16 Passage:In a study, shoppers who shopped in a grocery store without a shopping list and bought only items that were on sale for half price or less spent far more money on a comparable number of items than did shoppers in the same store who used a list and bought no sale items. Stem:Which one of the following, if true, most helps to explain the apparent paradox in the study's results? Correct Answer Choice:CChoice A:Only the shoppers who used a list used a shopping cart. Choice B:The shoppers who did not use lists bought many unnecessary items. Choice C:Usually, only the most expensive items go on sale in grocery stores. Choice D:The grocery store in the study carries many expensive items that few other grocery stores carry. Choice E:The grocery store in the study places relatively few items on sale.