The Use of a Placebo Control Is Essentially an Effort

Multiple Choice

The use of a placebo control is essentially an effort by a researcher to:

A) control for spontaneous remission.
B) control the unwanted effects of a drug treatment, such as side effects.
C) prevent research participants from showing a negative reaction to a treatment that is actually ineffective.
D) control for the expectation that a treatment procedure will cause some improvement.