As a Result of the Union Fighting to a Draw

As a result of the Union fighting to a draw militarily at Antietam Creek with Robert E. Lee's Confederate army

A) Lincoln named George McClellan commander of the Union forces.
B) the North decided to fight a war of containment.
C) Lincoln was now prepared to issue his Emancipation Proclamation.
D) Lincoln decided that the key to the war was controlling the Mississippi River.
E) the Union commanders were left without an overall military strategy.