The Capital Asset Pricing Model states that the expected return on a security depends on which of the following?

I. pure time value of money

II$.$ amount of systematic risk as measured by beta

III. the reward for bearing systematic risk as measured by the market risk premium

IV$.$ the reward for bearing risk as measured by the standard deviation

a$.$

II$,$ III, and IV only

b$.$

I, II$,$ III, and IV

c$.$

I, II$,$ and III only

d$.$

II and IV only