Imagine that you are a scientist studying the effects of a new medication on the treatment of patients who get headaches. You separate all the patients into three groups. Group A is given 1 pill with a dose of 20 milligrams of medication once per day. Group B is given 1 pill with a dose of 40 milligrams of the medication once per day. Group C is given 1 pill that looks like the others but is really a sugar pill that contains no medication. The results: 20 percent of the people in Group A claimed that they got fewer headaches, while 80 percent of the people in Group B daimed that they had fewer headaches. Only 1 percent of people in Group C noticed a decrease in their headaches. What might you be able to conclude from this experiment? Explain by identifying the control, the dependent variable, and the independent variable in the experiment.