Which of the Following Notions Is Central to the Leader-Member

Which of the following notions is central to the leader-member exchange theory?

A) That when worker self-confidence is low,supportive leadership can increase confidence by emphasizing individual abilities and offering needed assistance
B) That there is a tendency for leaders to develop special relationships with some team members,even to the point where not everyone is always treated in the same way
C) That leaders adjust their leadership styles according to the situation
D) That good leadership depends on the match or fit between a person's leadership style and situational demands
E) That leaders are most effective when they make decisions in ways that best fit the problem situation