问题：

[单选题]According to the mean-variance criterion, which one of the following investments dominates all others? ()N9v答案窝(daanwo.com)-大学作业答案分享平台
AE(r) = 0.15; Variance = 0.20N9v答案窝(daanwo.com)-大学作业答案分享平台
BE(r) = 0.10; Variance = 0.20N9v答案窝(daanwo.com)-大学作业答案分享平台
CE(r) = 0.10; Variance = 0.25N9v答案窝(daanwo.com)-大学作业答案分享平台
DE(r) = 0.15; Variance = 0.25N9v答案窝(daanwo.com)-大学作业答案分享平台
ENone of these options dominates the other alternatives.