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试卷: TS Critical Thinking 20 题 No2
[单选题]
6. To entice customers away from competitors, Red Label supermarkets have begun offering discounts on home appliances to customers who spend $50 or more on any shopping trip to Red Label. Red Label executives claim that the discount program has been a huge success, since cash register receipts of $50 or more are up thirty percent since the beginning of the program. Which of the following, if true, most seriously weakens the claim of the Red Label executives?
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