Volunteers in a Study Are Assigned Randomly to Groups

question 3

Multiple Choice

Volunteers in a study are assigned randomly to groups.Some of the volunteers receive an herbal supplement that is reputed to control nausea,and some of the volunteers are assigned to a control group where a placebo is administered.This is an example of a(n) :

• A)Longitudinal study.
• B)RCT.
• C)Meta-analysis.
• D)Appraisal tool.