Answer: Carnegie invested in the right industries at the right time— railroads, telegraphy, oil, iron and steel—to become very rich at a young age.
C. Growth of trade with the Middle East.
Because the Crusaders have ruled the Middle East for awhile, they established connections with some of the people groups there. And even though they lost the war, they still brought back valuable inventions and products (not inventions, like food, etc) that helped europeans in many way
hope this helps
Nationalism had many effects in Europe. I'll give you three examples. First, it gave Europeans a feeling up superiority. It caused Germany Italy, and Russia to unify. Finally it led to an alliance system in Europe. <span />
