When Will Bonds Sell at a Discount

When will bonds sell at a discount?

A) when the issuing company's credit standing is worse than that of other companies in a similar line of business
B) when the stated rate of interest is less than the yield rate of interest at the time of issue
C) when the stated rate of interest is more than the yield rate of interest at the time of issue
D) when the issuing company will be able to retire the bonds at less than face at maturity