How did Europeans use the idea of eugenics to justify colonization and imperialism?

Question

Europeans theorized that their economic superiority justified their claim to foreign resources for technological advancement.

Europeans thought that their scientific superiority supported their claim to the world’s natural resources for the advancement of mankind.

Europeans felt that their military superiority validated their seizure of other cultures’ land and resources.

Europeans believed they were racially superior and this validated their right to take the land and resources of other cultures.

Is it D? My reading says: "In other parts of Africa, scientific experiments were conducted on natives based on notions of European racial superiority."

Answer 1

Yes. D.