What was the europeans contribution to the new world?

The Europeans had brought culture, religion and some sort of political base. The Europeans introduced voting and other major political views. They had laid the foundation of trading and laws of which people had to obey. They gave ideas towards creating laws and a leader of the U.S. They have brought slaves, in which had made a imprint in American History. It brought much prejudice towards the African Americans and created groups like the Klu Klux Klan. They have spread all kinds of nationalities and traditions over the span of the country.

It’s either d or b ! but it might be b