Which of the following was used as a justification for imperialism?
a.
genocide
c.
westernization
b.
social darwinism
d.
resistance to expansion

I believe the correct answer from the choices listed above is option B.  Euros felt that they were the top of the human species because they were the most "civilized." They had guns, they had steel and they weren't afraid of using them to get gold, silver, silk, timber, and other riches that were found in other people's lands. This would make them Darwin's 'fittest to survive and thrive." 

Hope this answers the question. Have a nice day.

He opposed the ideas of the enlightenment and liberal changes his entire life.

The enforcement of a peace settlement