Assume that a speculator purchases a call option on British pounds (with a strike price of $1.50) for $0.02 per unit. A pound option represents 25,000 units. Assume that at the time of the purchase, the spot rate of the pound is $1.49 and continually falls to $1.43 by the expiration date. The highest net profit per contract possible for the speculator based on the information above is:

a. - $500 b. $100 c. - $100 d. $500