Hypothesize on a possible way that the mass extinction at the end of the Mesozoic Era contributed to mammals becoming the dominant life-forms during the Cenozoic Era.

i would say it is

regents of the university of california v. bakke, 438 u.s. 265 (1978), was a landmark decision by the supreme court of the united states. it upheld affirmative action, allowing race to be one of several factors in college admission policy.