Answer:
The most convincing 'internal' factor behind southern defeat was the very institution that prompted secession: slavery. Enslaved people fled to join the Union army, depriving the South of labour and strengthening the North by more than 100,000 soldiers. Even so, slavery was not in itself the cause of defeat.
Jews are a dead given, Hitler believed the Jews were bad people. Homosexuals weren't their main priority but they would arrest you sometimes even kill you for it.
Native Americans agreed to surrender most of the land in what is now Ohio, because of Pinckney's Treaty.
some of there contributions include the aqueducts, public baths, markets, and juries...etc.
I assume the best answer to your question is B