17. When the market price of the underlying security exceeds the exercise price, a a. call option is in the money. b. put option is in the money. c. call option is at the money. d. call option is out of the money. 18. Sellers (writers) of call options can offset their position at any point in time by a. selling a put option on the same stock. b. buying identical call options. c. selling additional call options on the same stock. d. All of these are correct. e selling a put option on the same stock AND buying identical call options