The correct answer is: A. Barnard
Chester I. Barnard was an American economist, sociologist, and political scientist who is considered one of the founders of modern organizational theory. He is best known for his work on the nature of authority and the role of communication in organizations.
In his 1938 book, The Functions of the Executive, Barnard defines authority as “the character of a communication in an organization by virtue of which it is accepted by a group as governing the action of that group.” He goes on to say that authority is “the sum of the powers and rights entrusted to make possible the performance of the work delegated.”
Barnard’s definition of authority is based on the idea that authority is a social phenomenon that is created and maintained through the interaction of individuals and groups. He argues that authority is not something that is inherent in a person or position, but rather something that is granted by others.
Barnard’s definition of authority has been influential in the field of organizational theory. It has been used to explain the nature of authority in a variety of organizations, including businesses, governments, and religious organizations.
The other options are incorrect because they do not define authority in the same way as Barnard. Fayol defines authority as “the right to give orders and the power to exact obedience.” Strong defines authority as “the power to influence the behavior of others.” Allen defines authority as “the right to command and the power to enforce obedience.”
These definitions are different from Barnard’s definition in that they focus on the power of the individual or position, rather than on the social interaction that creates and maintains authority.