OG12 逻辑87 求助

merryrq0209

87. 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, these declines are likely to have a noticeably negative economic effect
on these businesses and therefore on the economy of Florida.
Which of the following, if true, most seriously weakens the argument given?
(A) People who moved from one state to another when they retired moved a greater distance, on average,
last year than such people did ten years ago.
(B) People were more likely to retire to North Carolina from another state last year than people were
ten years ago.
(C) The number of people who moved from one state to another when they retired has increased signifi cantly
over the past ten years.
(D) 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.
(E) Florida attracts more people who move from one state to another when they retire than does any other
state.

本题答案选C，我想问一下C选项跟weaken有什么关系，我一点没有看出来，我觉得很无关。跟Florida一点关系都没有

coolhaoming

题干：退休后去佛罗里达的人占全国退休后迁徙人口的百分比降低了3个百分点。所以佛罗里达经济受到影响。
C：如果全国退休后迁徙的人口大大增加了，那么降低了3个百分点，但不一定降低总的来佛罗里达的人数。
例如：原来全国100万50万人去佛罗里达，后来降低到了47%，但是全国退休后搬家的人增加到了200万，那么去佛罗里达的人就是94万，比以前多很多~所以削弱结论~

coolhaoming

题干：退休后去佛罗里达的人占全国退休后搬家人的百分比下降了3%，因此佛罗里达经济将受到影响。

C 全国退休后搬家的人大幅增长。例如：100万人退休后搬家，佛罗里达占50%，即50万，后来全国退休后搬家人数增加到200万，佛罗里达降低了3%，即47%，现在是94万，比原来增加了很多，经济也不会变差。
所以C如果成立，将削弱题干

山炮

Ls正解，3%是个相对数值。经济与具体的人口数相关，所以和基数（退休后搬家人相关）。

merryrq0209

thx~