单项选择题
A.15.19% B.10.88% C.20.66% D.21.68%
A.保护性看跌期权 B.抛补看涨期权 C.对敲 D.保护性看跌期权+抛补看涨期权
A.0.13 B.0.53 C.0.45 D.0.25