Answer:
a. The tendency of color-blindness to minimize the importance of the historical legacies of race-based structural inequalities
Step-by-step explanation:
Affirmative action accounts to the policies which supports the members of any disadvantaged group who have suffered discrimination previously in areas as employment, education or housing. They are the policies towards the upliftment of these discriminated ethnic people.
In the context, the second commentator in his speech of ending the policies of affirmative actions shows negligence towards the importance of the legacy movement of the discriminated people in the past against the inequalities shown towards them.
Thus the answer is --
a. The tendency of color-blindness to minimize the importance of the historical legacies of race-based structural inequalities