Which Model Represents the Theory That Effective Group Performance Depends

Which model represents the theory that effective group performance depends on the proper match between a leader's style and the degree to which the situation gives control to the leader?

A) Vroom and Yetton's Leader-Participation Model
B) Fiedler's Contingency Model
C) Leader-Member Exchange Model
D) Hersey and Blanchard's Situational Leadership Model
E) none of the above