8. Dred Scott v.Sandford, March 6,1857 declared that (1) the Missouri Compromise was unconstitutional (2) that Congress did not have the authority to prohibit slavery in the territories (3) that slaves were not citizens of the United States and could not sue in Federal courts. How was the ruling by the U.S. Supreme Court in Dred Scott v. Sandford (1857), increase sectional tension in the United States? a. The decision supported the Missouri Compromise, which Southern farmers considered an unfair benet for the West. b. The ruling emancipated slaves when taken into free territories, which Southern slave owners saw as an illegal seizure of their property. c. The decision struck down the power of Congress to prohibit slavery in the territories, eliminating the economic advantages of Southern planters. d. The ruling declared that regardless of location, slaves were not citizens, which Northerners viewed as a violation of state law and human rights.