Suppose three mutual funds A, B, C achieved the same average return of 15% in the past decade. Look at the Security Market Line in below, are all three managers equally talented? Did they earn positive Alpha? 20% 15% i .. 10% B-1, Market Portfollo 5% 0 0.2 04 0.0 0.8 1 12 14 1.0 18 2 Beta A. A achieved positive B. B achieved positive a C. C achieved positive D, equally talented, all achieved positive and same average return