Which of the following statements regarding bonds payable is true?

a. A debenture bond is backed by specific assets of the issuing company

b. Generally, bonds are issued in denominations of $100

c. The interest rate in the bond contract is called the stated rate

d. when an issuing company's bonds are traded in the "secondary" market, the company will recieve part of the proceeds when the bonds are sold from the first purchaser to the second purchaser

explain.