DrCrandall Wants to Use the Scientific Method to Test Whether

Multiple Choice

Dr.Crandall wants to use the scientific method to test whether caffeine improves cardiovascular endurance in male athletes.What is the first thing that he should do?

A) Observe male athletes doing cardiovascular workouts after having consumed caffeine or not.
B) Develop hypotheses about caffeine consumption and cardiovascular endurance.
C) Randomly give half of the male athlete's caffeine and the other half no caffeine and then test their cardiovascular endurance.
D) Build a theory about caffeine's effect on the cardiovascular system.