Answer: C (Elton Mayo)

Explanation:
Elton Mayo is associated with the Human Relations Movement, not the Classical Management Theories. The Classical Management Theories are typically linked with theorists like Frederick Taylor (Scientific Management), Henri Fayol (Administrative Theory), Max Weber (Bureaucracy), and Mary Parker Follett (Early Management Thought). Mayo’s work focused on the importance of human factors in the workplace, as evidenced by his famous Hawthorne Studies.