Which ONE of the following bonds would have highest interest rate risk?

	a.	17-year zero coupon bond with $1,000 face value.
	b.	5-year 10% annual coupon bond with $1,000 face value.
	c.	12-year 4% annual coupon bond with $1,000 face value.
	d.	12-year 7% annual coupon bond with $1,000 face value.
	e.	17-year 5% annual coupon bond with $1,000 face value.