Researchers conducted a randomized comparative experiment to test a new drug to help balding men keep their hair. Forty-two percent of the placebo group kept or increased their hair compared to 86% of the men getting the new drug. What can we conclude? O The results of this experiment cannot be trusted because of the placebo effect. O The placebo effect is not present in this experiment because the men are randomly assigned to treatments O The placebo effect partially explains the results seen in the men taking the new drug