An analyst conducted a significance test to determine if the relationship between two variables was real or the result of chance. His null hypothesis is that the population correlation coefficient is equal to zero and his alternative hypothesis is that the population correlation coefficient is different from zero. He developed the following information:

The analyst conducted a:()

A. one-tailed test and can reject his null hypothesis.

B. two-tailed test and can reject his null hypothesis.

C. two-tailed test and cannot reject his null hypothesis.

我国医疗卫生体制改革的目标是建立适合我国国情的医疗卫生体制，绝不能简单的照搬其他发达国家的模式。从唯物辩证法的角度看，上述材料体现了（）

A.矛盾是事物发展的源泉和动力

B.具体问题具体分析

C.在实践中深化认识、发展认识

D.事物是普遍联系的