Can someone answer this question using excel?

Question 4 (Short a Call Option). You sold (wrote) a call option on Initech stock with an exercise price of $165. The maturity date of the option is in May and the option is an American style option. Which of the following statements is TRUE? A. You are obligated to sell Initech shares for $165 at any time prior to the option expiration date in May, if the owner of the option chooses to exercise. B. You are obligated to sell Initech shares for $165 when the option expires in May, regardless of the stock's market price. C. You have the right to sell Initech shares for $165 at any time prior to the option expiration in May, regardless of the stock's market price. D You are obligated to buy Initech shares for $165 when the option expires in May, regardless of the stock's market price