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题目选项分析

A study followed a group of teenagers who had never smoked and tracked whether they took up smoking and how their mental health changed. After one year, the incidence of depression among those who had taken up smoking was four times as high as it was among those who had not. Since nicotine in cigarettes changes brain chemistry, perhaps thereby affecting mood, it is likely that smoking contributes to depression in teenagers.

Which of the following, if true, most strengthens the argument?

【选项】Some participants entered and emerged from a period of depression within the year of the study.

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题目基本信息

  • 所属科目:逻辑CR
  • 题目来源1:PREP08 Test 2-72
正确率:52%