Which of the following is TRUE? All else equal, the higher the coupon rate on the bond, the longer the duration of the bond. When the investor's required rate of return is larger than the coupon rate of a bond, the bond will sell at a premium. The call feature of a corporate bond is an advantage to the issuing company if interest rates increase. The higher the investor's required rate of return on a bond, the higher will be the value of the bond to the investor. The basic relationship in bond valuation is for a given percentage change in required rate of return, the longer the time to matupify, the larger the change in bond value