I think the answer is B but I'm not sure sorry
The main economic factors that encouraged the growth of slavery was the heavily agricultural basis of the South's economy, which relied very much on slave labor. The geographic location of the southern colonies also made tobacco growth, and thus a demand for slaves high.
Nationalism Threatens Old Empires Notes: -Events in Austrian History that led to a Dual Monarchy -Balkan Peninsula: independent Balkan states,Hapsburg wanted a multicultural empire. nationalist revolts broke out in 1848.
The world wars. Mainly World War II when the United States earned the name the arsenal of democracy. At that time, Americans were beginning to believe that the world NEEDED the USA and that democracy had to spread throughout the globe. This led to the Korean and Vietnam War because American citizens felt obligated to be involved, at least in the beginning.
