Social darwinism was used to justify all of the following except:
a. imperialism b. enormous disparities in wealth c. eugenics programs d. communism

Social Darwinism was used to justify all of the following except "communism," since in fact communism sought in many ways to combat social darwinism, but ensuring that there were no class divisions within society, and the wealth was shared among all. 

it might be C or D i hope this helped