Slavery Was Legally Abolished in the United States by the

Slavery was legally abolished in the United States by the

A) ratification of the Fourteenth Amendment to the Constitution.
B) surrender terms of Robert E. Lee to Ulysses S. Grant at Appomattox.
C) Emancipation Proclamation.
D) congressional statute banning slavery in all the states and territories of America.
E) ratification of the Thirteenth Amendment to the Constitution.