Identification with one's own nation and support for its interests, especially to the exclusion or detriment of the interests of other nations.
I believe the answer is C
The proletariat made up the majority of the Roman population.
The Nazis used the theory of evolution as justification for their persecution of the Jewish people. In their mind, Jewish people were "corrupting" the non-Jewish bloodstream. This is what led to the reprehensible eugenics movement.
