Which was a provision of the Supreme Court’s ruling on the Scott v. Sandford case?

Sandford, legal case in which the U.S. Supreme Court on March 6, 1857, ruled (7–2) that a slave (Dred Scott) who had resided in a free state and territory (where slavery was prohibited) was not thereby entitled to his freedom; that African Americans were not and could never be citizens of the United States;

answer; /// i do believe that the correct answer is (d) cooperative play; /// good luck