If market rates do not change, as time pas
题型：单项选择题
问题：
If market rates do not change, as time passes the price of a zero-coupon bond will:（）
A. approach zero.
B. approach the purchase price.
C. approach par.
If market rates do not change, as time passes the price of a zero-coupon bond will:（）
A. approach zero.
B. approach the purchase price.
C. approach par.