Affirmative action in the United States:

Another popular argument for affirmative action is the compensation argument. Blacks were mistreated in the past for a morally irrelevant characteristic of being black so society today should compensate for the injuries. This causes reverse discrimination in the form of preferential hirings, contracts, and scholarships as a means to ameliorate past wrongs. Many opponents argue that this form of reparation is morally indefensible because if blacks were harmed for being black in the past, then preferential treatment for this same trait is illogical. In addition, arguments are made that whites today who innocently benefited from past injustices should not be punished for something they had no control over. Therefore, they are being reverse discriminated against because they are receiving the punishment that should be given to people who willingly and knowingly benefited from discriminatory practices

Please answer a question about this article. If the question is unanswerable, say "unanswerable". Which argument is being made by those who support affirmative action in relation to the compensation argument?
unanswerable