Someone Doesn't Need to Belong to a Group to for It

Multiple Choice

Someone doesn't need to belong to a group to for it to be a reference group for them.Why is this true?

A) Reference groups must consist of at least ten people.
B) People with weak ties are more likely to rely on reference groups.
C) Reference groups provide a standard for judging one's own attitudes or behaviors.
D) Reference groups must remain independent to be valuable to the individual.