The correct answer is D. it gave president Abraham Lincoln justification to issue the Emancipation Proclamation.
Explanation
The Battle of Antietam was one of the most famous warlike confrontations of the American Civil War during the year 1862. This battle is remembered for being an event that the course of the war and an important victory for the Union since despite not having been imposed militarily over the Confederate Army of the South, it is known as a Union victory, which in turn allowed President Lincoln to issue the Emancipation Proclamation on September 22, taking effect on January 1, 1863. So, the correct answer is the D. it gave president Abraham Lincoln justification to issue the Emancipation Proclamation.
