If the CAPM is valid, which of the following situations is possible: 1) Portfolio Expected return Standard deviation A 30 35 B 40 25 2) Portfolio Risk-free Market A Expected return 10 18 16 Standard deviation 0 0 24 12 3) Portfolio Risk-free Market A Expected return 10 18 20 Beta 0 1.0 1.5 4) Portfolio Risk-free Market A Expected return 10 18 16 Standard deviation 0 24 22 A) 1 and 3 only B) 1 and 4 only C) 2,3, and 4 only D) 1, 3, and 4 only E) 1,2,3, and 4