A. [img]https://360kao.oss-cn-hangzhou.aliyuncs.com/xingce/2018/2137458-options-formulas-49213.png[/img] B. [img]https://360kao.oss-cn-hangzhou.aliyuncs.com/xingce/2018/2137458-options-formulas-49214.png[/img] C. [img]https://360kao.oss-cn-hangzhou.aliyuncs.com/xingce/2018/2137458-options-formulas-49215.png[/img] D. [img]https://360kao.oss-cn-hangzhou.aliyuncs.com/xingce/2018/2137458-options-formulas-49216.png[/img]