The question involves identifying the theorist associated with the "Diffusion of Innovation" theory. Here is the step-by-step reasoning to arrive at the correct answer:
Understanding the Concept: Diffusion of Innovation is a theory that seeks to explain how, why, and at what rate new ideas and technology spread among cultures. It was first formulated by E.M. Rogers.
Analyzing the Options:
**Schumpeter** - Known for his work on economic innovation and entrepreneurship but not specifically the Diffusion of Innovation.
**Peter Drucker** - Renowned for his contributions to modern business management; not directly related to Diffusion of Innovation.
**Fredrick Taylor** - Known for Scientific Management Theory, focusing on labor efficiency rather than innovation diffusion.
**E.M. Rogers** - Authored the book "Diffusion of Innovations," laying the foundational framework for understanding how innovations spread.
Conclusion: E.M. Rogers is the correct answer because he is the scholar who formulated and popularized the Diffusion of Innovation theory, detailing how innovations are adopted across the social system over time.