To the extent that people feel their group membership is an important part of who they are,and the attachment people feel for their groups is best termed:

A) group entitativity.
B) group identity.
C) team-member exchange.
D) collective efficacy.

Group identity refers to the sense of belonging and attachment that people feel towards their group membership, and the extent to which it is an important part of their self-concept. Group entitativity refers to the perception that a group is a coherent and distinct entity, often based on shared characteristics or goals. Team-member exchange and collective efficacy are related constructs but not directly relevant to the question of group identity.