An investor has $11,000 to invest and believes that the IBM stock price is going to increase in the following 12 months from the current stock price of $200. Call options on IBM stock expiring in 12 months have a strike price of $223 and sell at a premium of $20 each. Assume that the stock price will be $268 per share after 12 months. What will be the investor's rate of return if they buy 550 call options?

A. 15% B. 125% C. 25% D. -100%