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

Select one:

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

b. A zero-coupon bond with a 1.5% yield to maturity will trade at a premium.

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

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