i prefer D.
percentage decreased-->many businesses cater to retirees-->negative effect on these businesses.
hidden assumption:percentage decreased = the number decreased.
weaken:the number=total * percentage,[ total increased, percentage decreased-> the number not decreased]
高,实在是高!~~
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退休后去F比例减少了3%(相对于退休后去其他州的人),D说退休后去其他州的人数显著上升,意味着退休后去其他州的人数与去F比例之积有可能大于十年前。
请看这道题的结论部分:Since many local businesses in Florida cater to retirees, this decline is likely to have a noticeably negative economic effect on these businesses.
所以,A 和C都是无关比较。A:比其他州更吸引人不能说明F的这些商业比以前没有下降。C:同理,旅游业再好,也不能说明对这些商业有影响。
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