The Battle of Antietam, also known as the Battle of Sharpsburg. 22,000 casualties, actually.
Back then , the city was shocked by smallpox epidemic. Since smallpox is easily transmitted by contact, overcrowded areas are the perfect breeding spot for smallpox ( they still has not developed small pox vaccine back then)
People believed it was morally wrong for one man to own another. Because of this slavery was hated by many.
B
Explanation:
because either was important to all