大全TEST III NO.19题

caoyt

请教：
19.Identical twins tend to have similar personalities; if environment outweighs heredity in personality development, twins raised together should presumably have more similar personalities than those raised apart. A recent study of identical twins in both situations measured 11 key traits through a questionnaire, and concluded that 7 of the 11 are primarily products of heredity.

Which of the following, if established, would cast the most doubt on the study’s results?

(A) Fewer than half of the pairs of twins studied were raised separately.

(B) The ages of all of the twins studied fell within a 10-year range.

(C) Some of the traits that the study attributed to heredity developed in the separately raised twins because those pairs all grew up in similar families.

(D) Although over half the traits measured were determined to be linked to heredity, the nature of those traits varied widely.
(E) The 11 traits that were measured constitute a representative sample of larger, generally accepted pool of key personality traits.

答案为C。为什么A不对呢？ 请大牛们指教！多谢！

mikacncat

是不是因为A只能削弱一小点，C可以削弱很多呀~~

caoyt

嗯~可能可以这么解释吧~但是在做的时候就是很纠结~
因为在很多题目里面样本的问题是经常被用来作为weaken的点啊！