What was the significance of the battle at Antietam Creek?

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

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

CThis was the site of the first ironclad ship battle.

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