Based on Source 1, which statement best explains how a large number
of free people and enslaved people responded to the institution of
slavery in the mid-1800s?
A
B
©
D
They argued that slavery was acceptable only in some parts of
the nation.
They worked together to keep slavery from expanding into
northern states.
They created a network of people and places to help individuals
escape slavery.
They organized groups to discourage people from moving to
southern states.