The correct answer is: C. Hendry Fayol.
Hendry Fayol was a French mining engineer and business executive who developed a general theory of business administration that is often called Fayolism. His theories were based on his experiences as a mine manager and his observations of other businesses. Fayol’s principles of management are still widely used today.
Mary Parker Follett was an American political scientist and management consultant who is considered one of the founders of organizational development. She is best known for her work on the principles of cooperation and coordination in organizations.
Lillian Gilbreth was an American industrial engineer and psychologist who is best known for her work on motion study and time study. She is considered one of the founders of industrial engineering.
Elton Mayo was an Australian psychologist who is best known for his work on the Hawthorne Studies. The Hawthorne Studies were a series of experiments conducted at the Hawthorne Works of the Western Electric Company in Chicago from 1924 to 1932. The studies showed that the workers’ productivity was affected by a number of factors, including the attention they received from the researchers, the level of social interaction among the workers, and the physical conditions of the workplace.