The security market line (SML) shows the relationship between beta and expected return. The following graph shows stocks' betas () and expected returns (): Assume that the CAPM holds and expectations of stocks' returns and betas are correctly measured. Which statement is NOT correct?

a. Stock D has a negative excess return (a negative alpha).

b. Stock E has more systematic risk than the market portfolio.

c. The price of Stock A will rise, and the excess return of Stock A will fall.

d. Rational investors should buy Stock C.

e. Stock B is underpriced.