The correct alternative is letter B. Brown v. Board of Education of Topeka, in 1954, was a very well known case judged by the Supreme Court of the United States which has decided to be unconstitutional all racial segregation in public schools in the United States. This decision has overturned a previous decision of 1986, in the Plessy v. Ferguson which had validated racial segregation in public areas in the US, such as schools, hospitals and bus and train stations.
