Final answer:
Groups are classified based on membership, strength of social tie, type of contact, and attraction, which illustrate the structure and dynamics of how individuals are brought together and how they interact within the group setting. The correct options are A,B,C,D.
Step-by-step explanation:
The criterion used to classify groups can include a variety of factors such as membership, strength of social tie, type of contact, and attraction. These aspects play significant roles in how groups are formed and maintained.
For instance, membership pertains to who is part of the group, while the strength of social tie relates to how closely individuals in the group are connected to one another. The type of contact may refer to whether interactions are online, face-to-face, or otherwise, and attraction can include shared interests or values that draw people together.
Additionally, reference groups are those whose values, norms, and beliefs come to serve as a standard for one's own behavior. Group polarization is the strengthening of the original group attitude after discussing views within the group, which is a common social phenomenon. The correct options are A,B,C,D.