问题详情

The correlations between two college admission tests and academic success in college are limited for the reason that ______.
A．many students drop out of schools
B．students are not adequately motivated
C．intellectual factors are more important for students than when they were in primary and middle schools
D．measures of college achievement are unreliable like those in primary and middle schools请帮忙给出正确答案和分析，谢谢！