D. All of these.
Sources of authority refer to any element, figure, person, or entity that has the power to influence or command thought, opinion, or behavior. This can be reflected in jobs, as for some people are "above" of others, some are leaders, others receive the command of the leaders; in biological or social relationship, for example: parents-child, grandparents-grandson/granddaughter, etc.; And rule, regulations or law of a institution, organization, community and nations as for they regulate, limit and promote the actions of a group of people.
