The Clarks, Kenneth and Mamie, made significant contributions to the Civil Rights Movement by researching the psychological impacts of segregation on children, which influenced the Brown v. Board of Education case. Additionally, early women psychologists played a crucial role in addressing social issues through their work. Therefore, the best answer to the question is option D: the Clarks.
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The Clarks made significant contributions to the Civil Rights Movement through their research showing the psychological impacts of segregation on children. Additionally, many early women psychologists played a vital role in addressing social justice issues. Their combined work provided a research foundation that influenced civil rights advocacy. ;