Which statement most accurately describes the significance
of the Emancipation Proclamation?

It immediately freed all the enslaved people in the Confederacy.

Explanation:

The Emancipation Proclamation of 1863 by President Abraham Lincoln, freed all enslaved people in the Confederate states of America. It did not free the enslaved people in the border states that remained loyal to the Union because Lincoln did not want those states to rebel and join the Confederacy.

The Proclamation had to effect of forcing European countries to avoid the supporting the South during the Civil War as they did not want to be seen as supporting slavery. It also reinvigorated the will of Black Americans to be free and so they helped the war effort in no small measure.