Which of the following statements does not explain why it took so many court cases to fully integrate Oklahoma’s schools?

The question asks which statement does not explain why integration required many court cases. Segregation affected multiple policies, institutions, and practices, so cases had to challenge them individually; long-established policies also made change difficult. The claim that the U.S. Supreme Court was overwhelmed with cases because so many African American Oklahomans sued is not an explanation given by the other choices and is not the underlying reason described. The correct choice is D, “So many African American Oklahomans sued segregated state institutions that the US Supreme Court was overwhelmed with cases.”

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