Answer:
The Clark's doll test study
Explanation:
Studies by Dr. Kenneth and Mamie Clark in the 1940s which was known as the doll test was cited by the Supreme Court in the decision which overturned separate but equal doctrine which was established in 1954 in the case of Plessy v. Ferguson.
The doll test was aimed at studying the psychological effect of segregation on African American children in which children between the ages of 3 to 7 were asked to identify the dolls they preferred and majority of them picked the white and attributed good qualities to it.
During the case between Brown and the Board of Education of Topeka, this experiment was cited by the Supreme Court in delivering their verdicts in favour of Brown prohibited segregation of black children in the education system.
They were both from Poland and they both fought in US Independence War. Kościuszko was fighting more in norther part of US, he was famous for building forts. Pułaski fought more on south US, he created first American cavalry. They are still national heroes in Poland.
B. For a term of four years
