According to the mean-variance criterion, which one of the following investments dominates all others? A. E(r) = 0.15; Variance = 0.20 B. E(r) = 0.16; Variance = 0.20 Ligher 20 C. E(r) = 0.10; Variance = 0.25 D. E(r) 0.16; Variance = 0.25 E. E(r) 0.15; Variance = 0.22 bIM