Answer: The Underground Railroad work by giving slaves and place to stay. The slaves went from house to house with a light in a window. Most of the houses had secret areas or false floors and carts. The slave would either get in one of the false floor area or get in the cart.
Harriet Tubman was the leader of the underground railroad. She would tell the slaves a certain time to go to each house.
The goal was to tell the rest of the world (mainly the Europeans) that the United States has official borders and that they could no longer colonize in the borders.
It also told the Europeans that the U.S would not interfere with their colonies or Europe itself.
Democracy hope this helps
<span>C) Russia became the first nation with a communist economic system</span>