" In 1973, Henry Mintzberg provided one of the first comprehensive studies on:

Correct option is B

Henry Mintzberg, in his 1973 work titled "The Nature of Managerial Work," presented a detailed analysis of what managers actually do in their daily activities. His research identified and categorized ten roles that managers fulfill, divided into three categories: interpersonal, informational, and decisional roles. Mintzberg’s work was groundbreaking because it provided empirical insights into the daily practices and realities of managers, debunking many previous theoretical assumptions about managerial work.
Information Booster:
Mintzberg's ten managerial roles are:
1. Interpersonal Roles:
· Figurehead, Leader, Liaison
2. Informational Roles:
· Monitor, Disseminator, Spokesperson
3. Decisional Roles:
· Entrepreneur, Disturbance Handler, Resource Allocator, Negotiator​​.
Additional Knowledge:
· Scientific Management (a): Refers to a theory developed by Frederick Taylor, focusing on efficiency and productivity through scientific methods.
· Styles of Leadership (c): Leadership style theories have been developed by various researchers, like Kurt Lewin, but this is not the focus of Mintzberg's work.
· The Wealth of Nations (d): This is a classic work by Adam Smith, published in 1776, discussing economics, not managerial work.