What Were the Motivations Behind Andrew Johnson's Impeachment

What were the motivations behind Andrew Johnson's impeachment?

A) The vast majority of the Senate had long disagreed with Johnson's hiring policies and tricked him into an action that would result in his immediate removal from office.
B) Johnson's own political party turned on him because he had let so much legislation pass through without trying to hinder the Republicans.
C) Democrats were angered that Johnson had acted far too harshly toward the southern leaders and managed to use their power to secure hard evidence against him.
D) The planter elite blamed Johnson for his role in helping to start the Civil War in the first place and had long tried to see to it that he be punished.
E) Radical Republicans were upset with Johnson because of his continued obstruction of their growing efforts at Congressional Reconstruction.