关于CR 700-800里面的一道题的求助

According to a recent research study, more than 90% percent of graduates of private high schools in a certain county continue their education in college. By contrast, only 65% of graduates of public high schools subsequently pursue college education. Therefore, if parents in the county wish to increase the likelihood that their children will attend college, they should send them to private rather than public schools. Which of the following statements would most seriously weaken the argument above?

A. Graduates of private schools typically score higher on standardized tests and other tests of academic achievement.

B. While private schools are typically very expensive, attendance of public school is free for the residents of the county.

C. In comparison with graduates of private schools, a substantially greater proportion of public school graduates receive need-based financial aid for their college education.

D. In comparison with private schools, public schools provide more opportunities for student involvement in sports and other athletic activities, which almost always increase the likelihood of students’ acceptance to colleges.

E. Since most public schools are located in rural areas of the county populated primarily by farmers, nearly 30% of students from public high schools choose to pursue farming occupations rather than apply to colleges.（正确选项）

此题的结论是：为了增加上大学的likelihood,应该去私立学校

解题思路：

该论点的结论是，如果把孩子送到私立高中而不是公立高中，他们更有可能上大学。这种说法的依据是，私立学校的毕业生接受大学教育的比例更高。假设公立学校作为大学的训练场，不如私立学校。任何为公立学校毕业生上大学的比例低于私立学校毕业生这一事实提供另一种解释的说法都会削弱这一论点。

另一种解释这个问题的方式涉及相关和因果关系的概念。该论点的前提是，私立学校的入学率（与公立学校的入学率）与大学入学率高度相关。该论证的结论基本上是，私立学校的就读会导致大学就读（因此，父母应该把他们的孩子送到私立学校，以确保最终的大学就读）。这个结论取决于这样一个假设，即因果关系并不是相反的--换句话说。上大学的准备程度或愿望 "并不影响对公立或私立学校的选择。任何证明准备程度或上大学的愿望确实影响了对公立或私立学校的选择的证据都会削弱这个论点。