Which graph best represents patterns of risk and return for all possible combinations of two risky stocks in a portfolio? The two stocks are represented by A and B and their returns are not perfectly correlated.

• A

• B

• C

• D

B B B. Expected Return (%) Expected Return (%) Standard Deviation of Return (%) Standard Deviation of Return (%) B B C. D. Expected Return (%) Expected Return (%) A Standard Deviation of Return (%) Standard Deviation of Return (%)