Which of the following statements about zero-coupon bonds is correct? Select one:

a. A zero-coupon bond with a 2% yield to maturity will trade at a premium.

b. Other things being equal, a zero-coupon bond with a higher yield to maturity to maturity has a lower price

c. The yields to maturity of zero-coupon bonds are always lower than that of coupon bonds.

d. Other things being equal, a zero-coupon bond with a longer maturity date has a higher price.