Which Answer Best Explains the Fall of the Plantation During

Which answer best explains the fall of the plantation during Reconstruction as a viable economic entity of the South?

A) Union troops had destroyed many of them during the Civil War.
B) They were abolished as an institution when the Radicals took over Congress.
C) Once a state was emancipated,its ready pool of workers disappeared.
D) Due to the death toll during the war,there were not enough able-bodied men to work the fields once the war had ended.
E) Cotton prices fell after the war due to increased competition from England.