问题如下：
Did Tyo’s assistant accurately describe the process of bootstrapping?
选项：
A.Yes
B.No, with respect to par yields
C.No, with respect to backward substitution
解释：
C is correct.
The assistant states that bootstrapping entails backward substitution using par yields to solve for zero-coupon rates one by one, in order from latest to earliest maturities. Bootstrapping entails forward substitution, however, using par yields to solve for zero-coupon rates one by one, in order from earliest to latest maturities.
这个题目的意思不太理解 思路是什么？
