George has to choose between investing in Stock A, which offers a high expected return but is a risky investment, and investing in Bond B, which offers a low expected return but bears a low risk. Not knowing George's degree of risk aversion, you would advise him to ________.

A.invest in Bond B if George wishes to minimize risk

B.invest in Stock A if George wishes to minimize risk

C.invest in Stock A if George wishes to minimize return

D.invest in Bond B if George wishes to maximize return