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