Stock a Has a Beta of 0

Multiple Choice

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 (r_M − r_RF) were to increase but the risk-free rate (r_RF) remained constant, which of the following would occur?

A) The required return would decrease by the same amount for both Stock A and Stock B.
B) The required return would increase for Stock A but decrease for Stock B.
C) The required return on Portfolio P would remain unchanged.
D) The required return would increase for Stock B but decrease for Stock A.
E) The required return would increase for both stocks but the increase would be greater for Stock B than for Stock A.