[問題]GWD1-Q13

[四季豆]

1-13. In the United States, of the people who moved from one state to another when they retired, the percentage who retired to Florida has decreased by three percentage points over the past ten years. Since many local businesses in Florida cater to retirees, this decline is likely to have a noticeably negative economic effect on these businesses.

Which of the following, if true, most seriously weakens the argument?

(C)There are far more local businesses in Florida that cater to tourists than there are local businesses that cater to retirees.
(D)The total number of people who retired and moved to another state for their retirement has increased significantly over the past ten years.

答案是:D
為什麼C不對呢?
為什麼D又對呢?
請大家幫忙~

[四季豆]

啊~現在才發現放錯地方,大家別理我!