Holding other factors constant, which one of the following bonds has the smallest duration?

Holding other factors constant, which one of the following bonds has the smallest duration?

		A) 7-year, 1% coupon bond
		B) 7-year, 5% coupon bond
		C) 7 year, 10% coupon bond
		D) 7-year, 0% coupon bond
		E) Cannot tell from the information given.