If interest rates decrease from 6 percent to 5 percent, which of the following bonds will have the smallest percentage increase in its value?

a.	A 10-year zero-coupon bond.
b.	A 10-year bond with a 10 percent semi-annual coupon.
c.	A 7-year bond with a 10 percent semi-annual coupon.
d.	A 5-year zero-coupon bond.
e.	A 5-year bond with a 12 percent semi-annual coupon.