Binomial Pricing: You Are Fortunate Enough to Own a Put

Binomial pricing: You are fortunate enough to own a put option with a strike price of $50 on the shares of Good Health Foods. The current share price is $4. When the option expires, you expect the share price to be either $2 or $5. The risk-free rate of interest is zero. What is the value of your option?

A) You would not exercise this option.
B) $45
C) $46
D) $48