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.

A Monte Carlo simulation can be used to:
Option A:directly provide precise valuations of call options.
Option B:simulate a process from historical records of returns.
Option C:test the sensitivity of a model to changes in assumptions.

Answer: C