Why Would an Athletic Trainer Advise an Athlete to Consume

Why would an athletic trainer advise an athlete to consume a little more than a 2-liter soda bottle full of water?

A) Soda is a stimulant that will help provide energy throughout the day.
B) Two-and-a-half liters of fluid is the equivalent of twenty glasses of water a day.
C) An active athlete would need to consume that much to replace the sweat-loss rate after exercising for an hour.
D) It is easier to relate consumption size to something common so the athlete will understand daily fluid intake.
E) That is how much fluid needs to be replaced for every pound lost due to sweat-rate loss.