All else held constant, which of the following will increase the expected return on a security based on CAPM? Assume the market return exceeds the risk-free rate and both values are positive. Also assume the beta exceeds 1.0.

I. decrease in the security beta

II. increase in the market risk premium

III. decrease in the risk-free rate

IV. increase in the market rate of return

II, III, and IV onlyII and IV onlyI, II, III, and IVI and III onlyI, II, and IV only