You are a scientist trying to determine whether a new drug will help treat heart disease. All of the following will generally increase the strength of your scientific study and your confidence in the results, except:

A) Increasing the number of patients in the study

B) Giving a placebo to the control group, thus controlling for the possibility that there will be a psychological effect of just receiving a pill

C) Making sure that the person handing out the pills knows which patients are getting a placebo versus which are getting the treatment