To value options, using the binomial method, is it necessary to know the expected return on the

Question:

To value options, using the binomial method, is it necessary to know the on the stock? Why or why not?
Expected Return
The expected return is the profit or loss an investor anticipates on an investment that has known or anticipated rates of return (RoR). It is calculated by multiplying potential outcomes by the chances of them occurring and then totaling these...