Role Structure Within Group Structure Describes the Expected Behaviors of Members

Role structure within group structure describes the expected behaviors of members in relation to each other as the group interacts. Which of the following describes the role of "gatekeeper"?

A) Seeks and accepts the authority or direction of others
B) Guides and directs group activity
C) Controls outsiders' access to the group
D) Focuses or directs movement toward the main work of the group