Answer:
The correct answer is letter "C": William Ouchi, Theory Z.
Explanation:
American professor William Ouchi (born in 1943) proposed the "Theory Z", first described in his book "Theory Z: How American Management Can Meet the Japanese Challenge" which is an approach that explains how firms should develop a strong company philosophy and culture and consensus in decisions.
Theory Z aims to employee development, as well, by concerning about their well-being, making them generalists instead of specialists, promoting individual responsibility, and monitoring them informally but with formal measures.