The correct answer is B) Brown v. Board of Education.
The Supreme Court decision that required the use of federal marshals to implement was Brown v. Board of Education.
In this case of 1954, the Supreme court decided that any kind of racial segregation in public schools had to be declared unconstitutional. Black children had the right to attend classes with white children. This decision ended with the past idea of "separate but equal," that had hurt the country so much. This new decision from the Court in the case of Brown v. Board of Education represented an important step in the American civil rights movement.