Assume you only $10,000 to invest. A stock is currently trading at $50 per share, and you believe that its price will go up for the next three months. A call option (buy) on this stock with 3 month maturity and strike of $50 (purchase price) is currently trading at $4.00, and the option on this stock with the same maturity and strike price of $55 is trading at $1.00.You can choose three alternative invest strategies:

a.Invest all the money in stock;

b.Invest all money in call options;

c.Buy a bull spread by buying option with strike of $50, and writing option with strike of $55.

Based on your view of the stock price level at the end of the next three months, under what circumstances will prefer one to the others?