What was the ruling of the dred scoot decision

Dred Scott decision, formally Dred Scott v. John F.A. Sandford, legal case in which the U.S. Supreme Court on March 6, 1857, ruled that a slave, who had resided in a free state and territory was not thereby entitled to his freedom; that African Americans were not and could never be citizens of the United States; and that the Missouri Compromise , which had declared free all territories west of Missouri and north of latitude 36°30′, was unconstitutional. If you need more informaion go to https://www.britannica.com/event/Dred-Scott-decision and it should help out alot .

Ibelieve the correct answer is d.