Which of the following statements is TRUE? Select one: a. The dividend on a common stock is an example of an annuity. b. Because most preferred stocks are perpetuities, their value can be determined by dividing the investor's required return by the annual dividend. c. A coupon bond that sells at its par value (ie, market value equals the face value) has positive expected capital gains. d. The amount of the preferred stock dividend is generally fixed, either as a dollar amount or as a percentage of the par value