Answer:
B. It invalidated the Missouri Compromise.
E. It ruled that African Americans could not be considered citizens of the U.S.
Explanation:
In the Dred Scott v. Sandford Case (1857), Dred Scott, a slave, filed suit for his freedom, alleging that his residence in Illinois (a free state) and the Louisiana Territory (where slavery was prohibited) from 1830 to 1840 approximately should make him a free man.
Despite Scott's efforts and bravery, the Supreme Court denied his freedom alleging that black people didn't have the right to sue in federal court because they weren't American citizens and they would never have such right, and it also invalidated the Missouri Compromise (1820), in which it had been declared that all territories west of Missouri and north of latitude 36°30′ were free; the Court states that the government had no power to exclude slavery from the territories, and therefore, the Missouri Compromise was unconstitutional.
