A portfolio is made up of Stocks A, B, C, and D in the proportion of 20%, 30%, 25%, and 25% respectively. The nondiversifiable risks of the stocks as measured by their betas are 0.4, 1.2, 2.5, and 1.75 for Stock A, B, C, and D respectively. The expected returns of the stocks are 12%, 24%, 5%, and 17% respectively. What is the expected return of the portfolio?

15.5%

3.9%

15.5%

24.4%

5.4%