Final answer:
Kenneth Clark's research was crucial in the Supreme Court's decision for Brown v. Board of Education, which deemed that 'separate but equal' facilities were unconstitutional in public schools.The correct is B.
Step-by-step explanation:
Kenneth Clark's research on prejudice, discrimination, and segregation played a fundamental role in the Supreme Court ruling for Brown v. Board of Education. This landmark case, decided in 1954, overturned the 'separate but equal' doctrine established by Plessy v. Ferguson. Clark, along with his wife Mamie Clark, conducted sociological and psychological studies, including the famous 'doll test,' which found that segregation induced feelings of inferiority among African American children, even if the facilities provided were equal in nature. Thurgood Marshall, chief counsel for the NAACP, used this evidence in successfully arguing the case. As a result, the Supreme Court recognized that segregation in public schools was unconstitutional because 'separate educational facilities are inherently unequal.'