Please explain why B is the answer

11. A newly issued 10 -year bond with a face value of $1,250 is trading at $1,437.0. Its coupons are paid quarterly, and the yield rate is 6%. After 3 years, the yield rate drops to 5.4%, what should the corresponding bond price be at that time? a) 1433.2 b) 1438.4 c) 1440.3 d) 1443.2