What Is the Major Difference Between the Ohio State Studies

What is the major difference between the Ohio State studies and the Michigan studies of leadership?

A) One is a situational approach;the other is a leader behavior approach.
B) One proposes four different types of leader behaviors;the other has only two.
C) One is based on the use of a decision tree;the other is not.
D) One says that you can be high on both groups of leader behaviors simultaneously;the other says you cannot.
E) One says that leaders can change their styles;the other says this cannot be done.