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?

1. Florida attracts more people who move from one state to another when they retire than does any other state. 无关的比较（F与其它州比）
2. The number of people who move out of Florida to accept employment in other states has increased over the past ten years. （支持）
3. There are far more local businesses in Florida that cater to tourists than there are local businesses that cater to retirees.
4. The total number of people who retired and moved to another state for their retirement has increased significantly over the past ten years.
5. The number of people who left Florida when they retired to live in another state was greater last year than it was ten years ago. （支持）

为什么C 不对?

请大家给予赐教

绝对数和百分比之间的差异！！

就算降低了这么多的百分比，但是绝对数是增加的，可以使收入照样增加

D可以理解，但是Ｃ为什么不对呢？　

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.

C. There are far more local businesses in Florida that cater to tourists than there are local businesses that cater to retirees.