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.

Which of the following is least likely to be required by the binomial option pricing model?
Option A:Spot price
Option B:Two possible prices one period later
Option C:Actual probabilities of the up and down moves

Answer: C