This approach to management owes much to other major schools of thought. For example, many of the ideas of the Gilbreths (scientific management) and Barnard and Follett (administrative management) influenced its development from 1930 to 1955. In fact, it emerged from a research project that began as a scientific management study. Which classical approach to management has been described here?

A. administrative management
B. systematic management
C. scientific management
D. human relations
E. bureaucracy

Ans: D. human relations