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.

When the price of the underlying is below the exercise price, a put option is:
Option A:in-the-money.
Option B:at-the-money.
Option C:out-of-the-money.

Answer: A