The Security Market Line (SML) Is Upward-Sloping, Indicating That The

The Security Market Line (SML) is upward-sloping, indicating that the:

A) Beta of an investment increases as its risk level increases
B) Average expected return on investments decreases as their risk level decreases
C) Average expected return on the risk-free asset increases as its beta increases
D) Average expected return of the market portfolio increases as its beta increases