Answer:
The answer is c. dehumanization.
Explanation:
Deshumanization is a psychological process in which two groups see each other as less than human, and thus are less worthy of consideration. These feelings lead to strong feelings of hatred on both parties. Dehumanization can lead to aggression or moral exclusion.
A common example of this were the Jews in the eyes of the Nazis. Psychologically, it was necessary to see them as sub-human to indulge in greater acts of violence.