Question 11: Which doctrine was overturned by the Supreme Court decision in Brown v. Board of Education? A: Due process of law B: "Separate but equal" C. "All deliberate speed" D: Equal protection of the law

## Step 1<br />The Supreme Court case of Brown v. Board of Education is a landmark case in the history of the United States. This case overturned a previous doctrine that had been established in the Plessy v. Ferguson case in 1896.<br />## Step 2<br />The Plessy v. Ferguson case had established the doctrine of "Separate but equal". This doctrine stated that racial segregation was constitutional as long as the separate facilities provided were equal.<br />## Step 3<br />However, the Brown v. Board of Education case overturned this doctrine. The Supreme Court ruled that "Separate educational facilities are inherently unequal". This means that segregation in public schools was unconstitutional, even if the separate facilities were equal.