Which Statement Would Most Likely Have Been Said by a Believer

Which statement would most likely have been said by a believer in Social Darwinism who was addressing the issue of imperialism?

A) "The very laws of nature reveal that national identity is not related to cultural worth."
B) "We must isolate ourselves from the uncivilized cultures of distant lands."
C) "American expansionism should most logically be restricted to North America."
D) "We must promote the superiority of our culture in an effort to ensure world stability."