Answer: Grutter v. Bollinger
Grutter v. Bollinger (2003) was a landmark case in which the Supreme Court upheld that the affirmative action admissions policy of the University of Michigan Law School was constitutional, as the school had a compelling interest in promoting diversity.
It also argued that the system was not equivalent to a quota system (which would have been unconstitutional) as it favoured underrepresented minority groups but also took into account many other factors on an individual basis.