According to the age of discovery Prince Henry the Navigator

Although Prince Henry the Navigator was neither a sailor nor a navigator, he sponsored a great deal of exploration along the west coast of Africa. ... Henry is regarded as an originator of the Age of Discovery and the Atlantic enslaved people trade.

ok sorry the answer is a. by their religion

thurgood marshall

explanation: in 1954, thurgood marshall and a team of naacp attorneys won brown v. board of education of topeka, kansas. in this landmark decision, the supreme court held that segregation in public education violated the equal protection clause of the fourteenth amendment.