107. A three-year option-free bond with an 8 percent annual coupon rate has a yield to maturity of
9 percent. Assume that the one- and two-year spot rates are 6.5 percent and 7.0 percent,respectively. The three-year spot rate is closest to:
A. 6.4%.
B. 8.1%.
C. 9.0%.
D. 9.2%.
答案是D，求解答过程，谢谢大家