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D没有问题，但是我觉得C也挺好的，far more 和noticeably对应，哪里有问题？请牛牛们指点

我觉得C不是直接削弱。Florida有更多服务游客的business,并不能消除减少的retirees到Florida对那些cater retirees 的local business 产生的显著影响。所以C不对。

C根本就是干扰选项， 题目问的是 专为退休人员而开设的那些生意是否受到严重影响，C说的是佛罗里达的旅游生意比老人家娱乐生意更加红火更加多，

在深圳烤鸡