Denote S_T as the stock price at the expiration date. Profits are in $ amounts.

The figure above shows the profits of an investor, who

	A.	goes short on a call option that has a strike price of $50
	B.	goes long on a put option that has a strike price of $50
	C.	goes short on a call option that has a strike price of $60
	D.	goes long a put option that has a strike price of $60

Profit 20 10 0 20 30 50 60 90 S T -10