Which of the following statements about bond premiums and discounts is true? a.A bond sells at a premium because buyers are willing to pay more than the face amount for bonds whose contract rate is higher than the market rate. b.A bond sells at a discount because buyers are willing to pay less than the face amount for bonds whose contract rate is higher than the market rate. c.A bond sells at a discount because buyers are willing to pay more than the face amount for bonds whose contract rate is less than the market rate. d.A bond sells at a premium because buyers are willing to pay more than the face amount for bonds whose contract rate is less than the market rate.