The Reconstruction Era in the South Came to an End

The Reconstruction era in the South came to an end because

A) African Americans had been granted full social, political, and economic equality in the South.
B) northern Republicans agreed to remove federal troops from the South and give up on their support for civil liberties if southern Democrats allowed Rutherford B. Hayes to become president.
C) the Supreme Court ruled that federal troops could not be stationed in southern states under the Constitution.
D) a referendum on the federal government's military presence was held in 1876 and a majority of Americans voted to end the Reconstruction policies.
E) in 1876, state legislatures from around the South passed laws forcing the federal government to remove all troops immediately.