单选题 An analyst does research about option value. Prior to expiration, the maximum value of an American call is the:
A. excise price.
B. current price of the underlying.
C. present value of the exercise price.

【正确答案】 B
【答案解析】[解析] 美式看涨期权最大值是股票的当前价格，因为期权是买入股票的权利，不会大于股票价格本身，否则还不如直接购买股票。