D) providing aid to groups of people previously discriminated against
Explanation:
The population of people that were previously discriminated against have harder economic and social condition than the class that were privileged during the time so they have it harder to study, harder to function in the society and harder to be in school.
To curb the gap between the two affirmative action takes place for the groups that ere discriminated against to make them more likely to study and develop to the level of the privileged.
