GWD-1-13请教

Q13:

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.


2. The number of people who move out of Florida to accept employment in other states has increased over the past ten years.


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.

答案是E。请NN解释。

答案应该是D。

虽然退休以后从一个州到另一个州生活的人当中，到Florida的人的比例下降，但如果象D所说的那样，总人数上升，那么到Florida的实际人数也不一定下降。

A怎么不对？FL吸引更多人不也就削弱吗？

大家看看啊，快考了。。。

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]

A is not right because the comparison surmount the confines.

we should compare the number in Florida, not Florida compared with other states.

我老了，所以变难看了。

NO,你比任何人都好看，所以你没有老。