You are conducting a study to see whether a new experimental medication will cause bald men to grow hair. You divide your patients into two groups. To one group, you give the medication. To the other group, you give a placebo. In this study, the correct terms for the taking of the drug and the growth of hair are the following. A. Both the medication and the hair growth are dependent variables. B. Both the medication and the hair growth are independent variables. C. The medication is the dependent variable, and the hair growth is the independent variable. D. The medication is the independent variable, and the hair growth is the dependent variable.