When bonds are retired at maturity, ________

When bonds are retired at maturity, ________.

a. the carrying value always equals the face value the carrying value equals the face value plus b. the unamortized premium or less the unamortized discount the entry to retire
c.the bonds may include a gain or loss on retirement of bonds the bondholders are paid the face value plus
d. the unamortized premium or less the unamortized discount?