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.

Prior to expiration, the lowest value of a European put option is the greater of zero or the:
Option A:exercise price minus the value of the underlying.
Option B:present value of the exercise price minus the value of the underlying.
Option C:value of the underlying minus the present value of the exercise price.

Answer: B