Mary Parker Follett, Elton Mayo, and Douglas McGregor are all prominent figures in the history of management thought who emphasized the importance of human factors, social interactions, and employee m

Mary Parker Follett, Elton Mayo, and Douglas McGregor are all prominent figures in the history of management thought who emphasized the importance of human factors, social interactions, and employee motivation in the workplace.

• Mary Parker Follett advocated for concepts like "power with" rather than "power over," emphasizing collaboration and integration in organizations.
• Elton Mayo is renowned for his Hawthorne Studies, which demonstrated the significant impact of social and psychological factors on worker productivity and satisfaction.
• Douglas McGregor developed Theory X and Theory Y, which describe contrasting assumptions about human motivation and their implications for management style.

These contributions collectively form the foundation of the Behavioural & Human Relations Approach to management, which focuses on understanding human behavior in organizations.

The correct answer is $\text{B}$.