What Was the Significance of the Military Reconstruction Act

What was the significance of the Military Reconstruction Act?

A) It was overturned by the Supreme Court and showed Congress's waning support.
B) It showed the decline of Radical power and the growing authority of the executive branch.
C) It required new state constitutions and established military districts in the South.
D) It removed federal troops from the South and gave southerners more say over Reconstruction.
E) It wiped out the black codes and gave African Americans a prominent place in the army.