What was the significance of the battle at Antietam Creek?

A- This battle was a turning point of the war, showing Britain and France that the Confederates had the clear advantage.

B- After this battle, McClellan was promoted by Lincoln for pursuing Lee’s beaten troops.

C- This was the site of the first ironclad ship battle.

D- The bloodiest single-day battle of the war, this attempt of Lee's to invade the North was thwarted.