You purchased a call option for $3.4517 days ago. The call has a strike price of $45, and the stock is now trading for $51. If you exercise the call today, what will be your holding-period return? If you do not exercise the call today and it expires unexercised, what will be your holding-period return? a. 173.9%;100% b. 73.9%;100% c. 173.9%;0% d. 57.5%;0%