Sports Fit Company Sponsors the "$100,000 Game" in Which Contestants

Sports Fit Company sponsors the "$100,000 Game" in which contestants compete in ten separate athletic events over a period of weeks.Sports Fit announces that the winner of each event will be awarded $5,000 with the "Ultimate Champion"-the winner of the most events-awarded $50,000.If the "$100,000 Game" is treated as a unilateral contract,Sports Fit can

A) cancel the contest or alter its terms at any time.
B) not modify the terms of the contest after it begins.
C) reduce the amount of the event prizes but not the grand prize.
D) reduce the amount of the grand prize but not the event prizes.