Why Do You Think There Has Been Greater Emphasis Placed

Why do you think there has been greater emphasis placed on "leadership skills" in recent years?

A) Because of an increase in the layers of management within a hierarchical structure of organization
B) Because of the movement away from managers relying solely on the power in their position within a hierarchical structure of organization
C) Because of the need for managers to have greater control over the activities of their subordinates
D) Due to a movement towards managers relying increasingly on the power in their position within a hierarchical structure of organization