Managerial-Grid model of leadership was developed by

Answer: Option A

The Managerial-Grid model of leadership was explicitly developed by Robert R. Blake and Jane S. Mouton in the 1960s.

It focuses on two key dimensions of leadership:

1. Concern for People: Reflecting the leader's emphasis on team members' needs and relationships.

2. Concern for Production: Reflecting the leader's emphasis on tasks, goals, and organizational objectives.

Blake and Mouton categorized leadership styles into different quadrants, including Impoverished (1,1), Country Club (1,9), Produce or Perish (9,1), Middle-of-the-Road (5,5), and Team Leadership (9,9).

Option D: Vroom and Fiedler is incorrect because they are associated with other leadership theories. Vroom contributed to the Expectancy Theory of Motivation, while Fiedler is known for the Contingency Model of Leadership.