In a Simple CAPM World Which of the Following Statements

Multiple Choice

In a simple CAPM world which of the following statements is (are) correct?
I. All investors will choose to hold the market portfolio, which includes all risky assets in the world.
II. Investors' complete portfolio will vary depending on their risk aversion.
III. The return per unit of risk will be identical for all individual assets.
IV. The market portfolio will be on the efficient frontier, and it will be the optimal risky portfolio.

A) I, II, and III only
B) II, III, and IV only
C) I, III, and IV only
D) I, II, III, and IV