a coach thinks a special sports drink will make his players stronger. he creates two groups of 20 players and gives each group the same task (each group are to lift 300 pounds). group A is given the special drink, but group B is not given the special drink. After an hour, the coach counts how many players were able to lift 300 pounds. in group A, 15 players were able to lift the 300 pounds, but only 5 players in group B were able to lift the 300 pounds. identify the: A. independent variable B. dependent variable C. control group