NO.PZ202109130200004304
问题如下：
which of the interpretations best describes Liu's findings?
选项：
A.Interpretation 1 B.Interpretation 2 C.Interpretation 3解释：
C is correct. Conclusions cannot be drawn regarding causation; they can be drawn only about association; therefore, Interpretations 1 and 2 are incorrect.
y作为因变量，x作为自变量，x的变化会引起y的变化，为什么A选项不正确
