Suppose you have a choice between four bond portfolios: Portfolio A is composed of five 10 -year bonds with a $1000 face value and annual coupons paying 9%, and five 5 year bonds with a $1000 face value and annual coupons paying 10%. Portfolio B is composed of ten 10 -year coupon bonds with a $1000 face value with annual coupons paying 9\%. Portfolio C, is composed of five 10-year bonds with a face value of $1000 and coupons paying 9%, and a 10 -year bond with a face value of $5000 and coupon paying 10\%. Portfolio D is composed of a one 10 -year $10,000 bond paying 9.25%. Which portfolio is most sensitive to interest rate fluctuations? A B C D Can't Tell from the information provided