Which of the Following Conclusions Was an Outcome of Further

Which of the following conclusions was an outcome of further studies on the research done by Elton Mayo and Fritz Roethlisberger at the Hawthorne plant of the Western Electric Company?

A) Workers' productivity will increase whenever managers give them special attention.
B) Organizations can be managed in an impersonal manner.
C) Institutionalized social norms and expectations control people's actions by setting up predefined patterns of behaviour.
D) Authority should go to the person who holds the position of manager.