Answer:
Option D.
Step-by-step explanation:
The case Brown v. Board of Education, is the right answer.
The case Brown v. Board of Education in the history of the United States was a milestone case resolved by the Supreme Court of the U.S. This case affirmed "separate but equal" institutional amenities for black and white children violated the 14th amendment of the Constitution of the U. S. Following this nine black students attempted to join and visit Little Rock Central High School (a formerly all-white school) after this event. But the Governor of Arkansas declined to permit these students in by practicing the state army to stop them from joining. The then President of the United States acknowledged by posting in the national guard to accompany these pupils into the school.