In golf, a golfer must have a score of 0 on order to be at par. A golfer scores 2 above par on the first hole, 1 below par on the second hole, and 2 below par on the third hole. Which expression can be used to decide whether the golfer is at par after the first three holes? A: (-2) + 1 + 2. B: 2 + (-1) + 2. C: 2 + (-1) + (-2).