Which of the following is a theory for the dinosaur extinction?
1.dinosaurs were allergic to pollen
2.increased radiation levels
3.diseases from other animals
4.all of above

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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.