Answer:
E. If a coupon bond is selling at par, its current yield equals its yield to maturity
Step-by-step explanation:
At par means at face value. A bond may sell at par, below par or above par. A bond that trades at par has a yield that is equivalent to its coupon. Investors expect to have a return that is equal to the coupon for the risk of lending to the bond issuer.
The coupon rate of a bond is equal to its yield to maturity if the purchase price is equal to its par value or face value.
From the paragraph above, this makes option E the best answer for the question.