This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
A random sample suggests that 
Select and explain. 
A. A person in a control group will not be a member of the experimental group, B. Any member of a group to be studied has an equal opportunity to be included in the study, C. Every nth name on a list is selected, D. Subjects are volunteers
B: Any member of a group to be studied has an equal opportunity to be included in the study
Answer: B: Any member of a group to be studied has an equal opportunity to be included in the study 
Explanation: None