Stock A has a beta of 0.8 and Stock B has a beta of 1.2. 50% of Portfolio P is invested in Stock A and 50% is invested in Stock B. If the market risk premium (rM RF) were to increase but the risk-free rate (rRF) remained constant, which of the following would occur? O a. The required return would increase for Stock B but decrease for Stock A b. The required return on Portfolio P would remain unchanged. O c. The required return would increase for both stocks but the increase would be greater for Stock B than for Stock A. O d. The required return would increase for Stock A but decrease for Stock B. O e. The required return would decrease by the same amount for both Stock A and Stock B