The answer would be letter A.
The term "white mans burden" refers to imperialism, Eurocentric racism and Western aspirations to dominate the developing world. However, this phrase did not start as a broad term but was a poem by Rudyard Kipling about the colonization of the Philippines by the United States after taking it from Spain during the Spanish-American War.
These are some of the states that gained their independence
MexicoHaitiColombiaVenezuelaBrazil
They supported the union with supplies and ammounation
I think is the Nullification crisis and the war he fought.
