问题如下图：
选项：
A. 
B. 
C. 
解释：
1.老师通过correlation 的大小能判断协方差的大小吗？
2.协方差不是只能判断两组资产的同向性吗？协方差的具体数值能说明风险大小吗？
NO.PZ2018062016000071 问题如下 When the correlation between two stocks creases from 0 to -1, the versification benefit will: A.increase. B.crease. C.remain the same. A is correct. the correlation between two stocks creases, versification effemenhananversification benefit will increase. analyst gathers the following information:Whisecurity hthe highest totrisk?
NO.PZ2018062016000071 问题如下 When the correlation between two stocks creases from 0 to -1, the versification benefit will: A.increase. B.crease. C.remain the same. A is correct. the correlation between two stocks creases, versification effemenhananversification benefit will increase. 这个问题考的概念是不是就是correlation coefficient的绝对值越大，线性关系越强？
NO.PZ2018062016000071 问题如下 When the correlation between two stocks creases from 0 to -1, the versification benefit will: A.increase. B.crease. C.remain the same. A is correct. the correlation between two stocks creases, versification effemenhananversification benefit will increase. 如果说correlation，p 从0 变成了-1 ，虽然说他们之间的相关性变的很强了，但是是inverse的，所以是对投资分散有好处，是这样理解吗？
NO.PZ2018062016000071 问题如下 When the correlation between two stocks creases from 0 to -1, the versification benefit will: A.increase. B.crease. C.remain the same. A is correct. the correlation between two stocks creases, versification effemenhananversification benefit will increase. 这个题目这里，variance下降，说明组合versification分散，风险低。但是离散程度跟这个题目有关吗这两个概念有点模糊感谢回答
NO.PZ2018062016000071 问题如下 When the correlation between two stocks creases from 0 to -1, the versification benefit will: A.increase. B.crease. C.remain the same. A is correct. the correlation between two stocks creases, versification effemenhananversification benefit will increase. 我没有看到这个概念的出现，请问分散化和离散化在这里是不是两个概念？这个vers在这里具体的含义是什么？另外，如果按照答案理解，或者您关于前面几个提问的回答，这道题是不是可以理解为\"对冲效果\"最好?
