答案及解析：[单选题]Other things equal, diversification is most effective when () Asecurities' returns are uncorrel - 经济学类题库- 答案窝(daanwo.com)-大学生作业答案及考资分享平台

问题：

[单选题]Other things equal, diversification is most effective when ()
Asecurities' returns are uncorrelated.
Bsecurities' returns are positively correlated.
Csecurities' returns are high.
Dsecurities' returns are negatively correlated.
Esecurities' returns are positively correlated and high.