Answer: C (both A and B)
Step-by-step explanation:
Both primary and secondary groups are social groups where people interact with one another and are united.
For the greatest degree of psychological satisfaction and material rewards, most people must participate in both primary and secondary groups.
A primary group is a small group. It is one where it’s members share very close, personal and sometimes intimate relationships. Members of a primary group are a good source of support and encouragement to each other, often offering psychological support to each other. Examples include; members of a family and close friends.
A secondary group on the other hand is one where it’s members are not really attached to one another and are only together to achieve a common goal. Examples include, relationship between colleagues, doctor-patient relationship and vendor-client relationship.
So while primary groups offer psychological satisfaction, secondary groups offer material rewards.