请教FeiFei-20 - ChaseDream - Powered by Discuz!

本人很笨，可能很多人觉得很简单，但我就是不懂

20. A rise in the percentage of all 18-year-olds who were recruited by the armed services of a small republic between 1980 and 1986 correlates with a rise in the percentage of young people who dropped out of high school in that republic. Since 18-year-olds in the republic are generally either high school graduates or high school dropouts, the correlation leads to the conclusion that the republic’s recruitment rates for 18-year-olds depend substantially on recruitment rates for high school dropouts.

Which one of the following statements, if true, most weakens the argument?

A. A large number of 18-year-old high school graduates were recruited for the republic’s armed services in 1986 than in 1980.
B. Many of the high-technology systems used by the republic’s armed services can be operated only by individuals who have completed a high school education.
C. Between 1980 and 1986 the percentage of high school graduates among 18-year-olds recruited in the republic rose sharply.
D. Personnel of the republic’s armed services are strongly encouraged to finish their high school education.
E. The proportion of recruits who had completed at least two years of college education was greater in 1986 than in 1980.

答案C，我想不通C是怎样削弱原文结论的，请哪位好心人说说这怎么推的，尽量详细，我理解能力不强，谢谢！

18岁征兵来源肯定是A高中毕业生B辍学生，但是原文并没有交代高中毕业生的情况

所以C选项交代了the percentage of high school graduates的情况（而且还用了sharply形容）

“那我高中毕业生入伍比例也sharply的增加了呢，凭什么不说啊”——画外音

就打破了这个结论了

我是这么分析的

18岁的征兵比例增加了，然后的高中辍学的人的比例也增加了，所以说征兵的比列和辍学的比例是相关的（直接就这么样子建立了联系）

最weaken这个逻辑就是打破这个联系，18岁的兵很多是高中毕业的，也就是C拉