Answer is Option B: The Emancipation Proclamation freed all slaves in theory, but the 13th Amendment was needed before abolition could be enforced.
Explanation:
“The Proclamation of Emancipation” was made by President “Abraham Lincoln”. The Proclamation supported freedom of slaves in U.S. The Proclamation held that all the slaves in the state of rebel shall be held as free forever. This was announced during the Civil war. It came into effect from 1863. However, Lincoln felt that to completely abolish slavery in all of U.S. (because few states who rejoined Union before 1863 retained slavery), Lincoln promoted the “Thirteenth Amendment”. Reconstruction plans for Southern states were insisted so that slavery is abolished in the new state constitutions. Then, “Thirteenth Amendment” was passed in 1865.
