A 10-year corporate bond has an annual coupon rate of 9%. The bond is currently selling at premium. Which of the following statements is most incorrect?
a. The bond's yield to maturity is lower than 9%.
b. The bond's current yield is 9%.
c. If the bond's yield to maturity remains constant, the bond's price will increase over time toward maturity date.
d. Both b and c are incorrect.
e. Both a and c are incorrect.