Use the Following to Answer Questions

Multiple Choice

Use the following to answer questions :

-The psychologist running this experiment could best uphold standards for double-blind assessment by taking which of the following measures?

A) Having each of the test subjects take the test in complete isolation
B) Verifying that the placebo will have no positive effects on the subjects
C) Ensuring that subjects who take the test have no prior knowledge of its subject matter
D) Keeping the researcher who administers treatments from knowing which ones are placebos