Ijoma belongs to a union$$s bargaining unit. Which of the following describes her?

She is an attorney, a mediator, or an arbitrator assigned to resolve a dispute between labor and management.

She is a member of a specific group of employees that the union must represent.

She is a member of a specific group of union employees that must represent both union members and nonunion workers.

She is a member of a specific group of union employees that must represent union members exclusively.