A bond indenture is Oa. a contract between the corporation issuing the bonds and the bondholders Ob. the amount for which the corporation can buy back the bonds prior to the maturity date Oc. a contract between the corporation issuing the bonds and the underwriters selling the bonds d. the amount due at the maturity date of the bonds When the corporation issuing the bonds has the right to redeem the bonds prior to maturity, the bonds are Oa. convertible bonds Ob. callable bonds Oc. debenture bonds Od. unsecured bonds When the maturities of a bond issue are spread over several dates, the bonds are called a. debenture bonds b. serial bonds Oc. term bonds Od. bearer bonds The market interest rate related to a bond is also called the a. straight-line rate Ob. contract interest rate Oc. stated interest rate d. effective interest rate