Which of the following statements is true of a formal group?

A) It is typically formed around common personality traits.
B) Its members don't necessarily have the final say about their membership.
C) Its members primarily use the grapevine network to communicate official messages.
D) Its members are not affected by organizational boundaries.

Formal groups are usually formed based on an organization's structure, hierarchy, or job function. The members of a formal group have specific roles and responsibilities, and their membership is generally determined by the organization. The grapevine network is an informal communication channel and is not typically used for official messages in formal groups. Organizational boundaries do affect the interactions and decisions made within a formal group.