. A bond with a face value of $1,000 has annual coupon payments of $80 and was issued 10 years ago. The bond currently sells for $1,000 and has 8 years remaining to maturity. This bond's ______________ must be 8%.

I. yield to maturity

II. after tax cost of debt

III. coupon rate

A) I only

B) I and II only

C) III only

D) I and III only

E) I, II and III