I believe you right C should be the answer
I suppose it made the free states and slave states in some way even. When Missouri became a slave state they kept the north end of the Louisiana purchase free stated and banned slavery there.
Joseph Chamberlain's speech and Rudyard Kipling's poem “White
man’s burden” have in common: D. Both discuss the responsibilities and sacrifices of imperialism. The phrase “white man’s burden”
implies that imperialism was motivated by desire of white people to uplift
people of color.
I am pretty sure that Assimilation is the adoption of another's culture
Strike affected rail transportation nationwide, essentially bringing American business to a halt. Workers resented not only cut in wages, but management's intrusiveness into their personal lives. The federal government became involved, with federal troops being sent to open railroads.
Hope this helps :)