Which of the following are true statements? I. A firm with a beta of -1.45 is riskier than the market. II. A firm with a beta of .35 moves in the same direction of the market. III. A firm with a beta of -.23 is riskier than the market. IV. A firm with a beta of -1 moves exactly as the market moves. I and II only b. I and III only c. II, III, and IV only I d. I, II, and IV only a