Why did the Emancipation Proclamation only apply to states outside of the

Union? (1 point)
The Reconstruction Amendments already banned slavery inside the U.S.
President Lincoln only had the authority to ban slavery in the Confederacy, not
the Union.
States within the Union had already abolished slavery.
President Lincoln wanted to preserve slavery in the Union but punish
Confederate states.

The Emancipation Proclamation only applied to states outside of the Union because states within the Union had already abolished slavery.