In the Experimental Evaluation of a New Drug, What Is

Multiple Choice

In the experimental evaluation of a new drug, what is the purpose of a placebo?

A) A placebo increases the sample size.
B) A placebo prevents errors in recording of the data.
C) A placebo removes the bias of the physician in charge of the experiment.
D) A placebo removes the potential psychological bias of the patient in the study.
E) A placebo prevents sampling errors from compromising the results of the experiment.