※ 引述《chenemily (天天保持好心情)》之銘言：
: Researchers took a group of teenagers who had never smoked and for one year
: tracked whether they took up smoking and how their mental health changed.
: Those who began smoking within a month of the study’s start were four times
: as likely to be depressed at the study’s end than those who did not begin
: smoking. Since nicotine in cigarettes changes brain chemistry, perhaps
: thereby affecting mood, it is likely that smoking contributes to depression
: in teenagers.
原文最後結論是：「抽煙導致青少年憂鬱」
: Which of the following, if true, most strengthens the argument?
: A.Participants who were depressed at the study’s start were no more likely
: to be smokers at the study’s end than those who were not depressed.
支持題，一般答案分為「因果支持」、「對照組支持」、「反駁的反駁支持」三種。
先將答案A中 no more 略去不看，整句意思是「這些人因憂鬱而開始吸煙」，
所以成為「倒因為果」的反駁答案。
然後，再將 no more 加回去，這時整句話的作用，便成為「反駁的反駁」，
而支持原主張。
以上，供參考
: B.Participants who began smoking within a month of the study’s start were
: no more likely than those who began midway through to have quit smoking by
: the study’s end.
: C.Few, if any, of the participants in the study were friends or relatives of
: other participants.
: D.Some participants entered and emerged from a period of depression within
: the year of the study.
: E.The researchers did not track use of alcohol by the teenagers.
: 可以請問一下a是哪裡支持嗎
: 其他選項錯的我都可以排除
: 但a我不知道對在哪裡
: 謝
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