$($Select the best choice below.$)$

A$.$ Because the value of the bond is discounted, the return on the bond is reduced and the yield exceeds the coupon.

B$.$ The bond's coupon yield'is irrelevant. It trades at a discount because investors avoid these bonds.

C$.$ The bond is trading at a discount because investors don't like the bond.

D$.$ The bond can be purchased for a discount, which gives it an "extra return"; hence, the yield exceeds the coupon.