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

E$.$ Leaders are most effective when they make decisions in ways that best fit a problem situation.

C$.$ Leaders adjust their leadership styles according to the situation.

A$.$ When worker self$-$confidence is low, supportive leadership can increase confidence by emphasizing individual abilities and offering needed assistance.

B$.$ 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.

D$.$ Good leadership depends on the match or fit between a person s leadership style and situational demands.