Answer:
A.
Step-by-step explanation:
President Abraham Lincoln issued the Emancipation Proclamation on January 1, 1863, as the nation approached its third year of bloody civil war.
The proclamation declared "that all persons held as slaves" within the rebellious states "are, and henceforward shall be free.
The Emancipation Proclamation also allowed for the enrollment of freed slaves into the United States military. The Union-occupied counties of eastern Virginia and parishes of Louisiana, which had been exempted from the Proclamation, both adopted state constitutions that abolished slavery in April 1864.