Slaves were considered property. Their owners wanted to restrict their freedom so they wouldn't be as likely to escape.
The answer would be C. the movement of plants, animals, people, and diseases between the old world and the new world.
Hope this helped!
~Just a girl in love with Shawn Mendes
World War 1 Ends
Germany suffers from hyperinflation
The Weimar Republic is created
The Great depression hits
Hitler comes to power