Answer:
It took Congress 17 days to vote for independence.
The Underground Railroad was the name of the escape routes used by slaves to escape the South and flee to the North. It was a network of special routes and safe houses that were used by both slaves and abolitionists who were sympathetic to their cause of escaping slavery. It started in the late 1700's and ended after the abolition of slavery. Canada was a popular destination, as slavery was prohibited their and had a longer border for easier access.
Mexican workers provided labor on American Farms.
Well that's easy it's the last one that all slaves should be freed through the United States.
