Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

At expiration, a European put option will be valuable if the exercise price is:
Option A:less than the underlying price.
Option B:equal to the underlying price.
Option C:greater than the underlying price.

Answer: C