4. Which of the following will increase the price of a bond, all else constant? 1. Decreasing the time to maturity of a zero coupon bond II. Increasing the coupon rate III. Decreasing the market rate of return IV. Increasing the yield to maturity A. I and II only B. I and IV only C. Il and Ill only D. I, II, and Ill only E. I, II, and IV only