Aharon exercises 10 stock options awarded several years ago. The following information pertains to the options: (1) each option gives the employee the right to buy 10 shares, (2) the market price on the grant date was $7, (3) the strike price is $10, and (4) the market price on the exercise date was $15. How much will it cost Aharon to purchase the options on the exercise date?

A, $90
B, $500
C, $700
D, $1,000