People who join interest groups for a sense of pleasure, status, or companionship are joining because of

• A. Material incentives.
• B. Solidary incentives.
• C. Purposive incentives.
• D. Party incentives.

Answer: (B)

Different reasons people join groups include social rewards. When someone joins for a sense of pleasure, status, or companionship, they’re motivated by solidary incentives—the personal satisfaction and social benefits that come from being part of a group, meeting others, and feeling connected or valued within the community. This contrasts with material incentives, which are tangible rewards like money or discounts, and purposive incentives, which push people to join to advance a cause or ideology. There isn’t a standard category called party incentives in this framework. So, the best answer is that those social, belonging-based motivations come from solidary incentives.