Researchers are conducting a study to determine the effects of vitamin D supplements on the adult human immune system.The study involves providing pills that contain vitamin D to one group of human adults and pills that do not contain the vitamin or other active ingredients to another group of adults.The pills that do not contain vitamin D are
A)interventions.
B)distractors.
C)placebos.
D)antidotes.

Question

Quizplus · Accepted Answer

Pills that do not contain the vitamin or other active ingredients are used as placebos in the study. Placebos are used to provide a control group to compare against the group receiving the actual intervention (vitamin D supplements).

Researchers Are Conducting a Study to Determine the Effects of Vitamin