Fund A has an expected return of 11.4%, a standard deviation of 18.2% and a beta of 1.05. Fund B has an expected return of 12.1%, a standard deviation of 17.8% and a beta of 1.11. Fund C has an expected return of 10.9%, a standard deviation of 16.8% and a beta of 0.90. Fund D has an expected return of 10.75%, a standard deviation of 19.1% and a beta of 0.92. The S&P 500 index has an expected return of 11.5%, a standard deviation of 16.2% and a beta of 1.00. The T-bill has an expected return of 4.5% What is the lowest return an investor would accept from his/her portfolio? 0% 4.5% 7% 11.5%