The statement that best investigates the relationship between Social Darwinism and New Imperialism is:
"Social Darwinism portrayed White Europeans as culturally superior to other races and was used to justify the colonization of other nations."
This statement accurately reflects how Social Darwinism was utilized during the era of New Imperialism to rationalize the expansion of European powers into other regions, framing colonization as a natural and beneficial process in which "superior" races brought civilization to "inferior" ones.