In 1954, the Supreme Court case Brown v. Board of Education upheld Plessy V. Ferguson by ruling segregation constitutional. Hence, the correct answer is option D.
In the judgement delivered in 1954, Warren said 'In the field of public education the doctrine of 'separate but equal' has no place' as 'segregated schools are inherently unequal'. Consequently, the court ruled that the complainants were were being deprived of the equal protection of the laws guaranteed by the 14 Amendment.
Therefore, the correct answer is as given above.
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