Cindy conducted an experiment for her science class. She repeated the experiment three times. Each time, Cindy got a different result. What should Cindy do next?
A. Add another variable into the experiment and repeat the experiment a fourth time.
B. Stop trying to test the current hypothesis and find a new hypothesis to test.
C. Go over the experimental procedure to make sure there is only one variable.
D. Use the results obtained from the first experiment to draw conclusions.
