In a study, shoppers who shopped in a grocery store without a shopping list and bought only items that were on sale f...

bingolawyer on December 3, 2019

Difference between B & C

Comparable amount of items are the operative words that broke the tie between B & C. B says that the shoppers bought many unnecessary items. However, since the number of items is similar, this answer doesn't give us any information. C explains why more money was spent on an equal amount of numbers.

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BenMingov on December 3, 2019

Hi Bingolawyer, you seem to be spot on here.

Since the number of items is reasonably similar, then the distinction between necessary and unnecessary doesn't help explain why those without a list spend more. Especially if these items are on sale!

And your reasoning for answer choice C is sound as well. Same number of items, but far more expensive could explain how those without a list spend more.

The person with a list bought Cheerios at full price (e.g. $5), the person without a list bought Alba white truffles for half off (e.g. $100 for a given quantity).

I hope this helped, please let us know if you have any other questions.