(A) It made the war about defending the Constitution
(B) It made the war about preserving the union of the country
(C) ** It made the war about ending slavery
(D) It made the war about keeping slavery
EXPLANATIONS BELOW
Concept note-1: -From the first days of the Civil War, enslaved people had acted to secure their own liberty. The Emancipation Proclamation confirmed their insistence that the war for the Union must become a war for freedom. It added moral force to the Union cause and strengthened the Union both militarily and politically.