问题如下：
An at-the-money American call option on a stock that pays no dividends has three months remaining until expiration. The market value of the option will most likely be:
选项：
A.less than its exercise value.
B.equal to its exercise value.
C.greater than its exercise value.
解释：
C is correct.
Prior to expiration, an American call option will typically have a value in the market that is greater than its exercise value. Although the American option is at-themoney and therefore has an exercise value of zero, the time value of the call option would likely lead to the option having a positive market value.
老师你好，可以完整讲一下这道题么？
