There is a six month European call option available on XYZ stock with a strike price of $90. Build a two step binomial tree to value this option. The risk free rate is 2% (per period) and the current stock price is $100. The stock can go up by 20% each period or down by 20% each period.

Select one: a. $14.53 b. $17.21 c. $18.56 d. $12.79 e. $19.20