Final answer:
The Dred Scott v. Sandford case intensified sectional tensions and nullified previous compromises over slavery, such as the Missouri Compromise and the Compromise of 1850 by stating that the federal government had no power to regulate slavery in federal territories.
Step-by-step explanation:
The Supreme Court's decision in the Dred Scott v. Sandford case had a profound impact on the pre-existing compromises over slavery in the U.S. The best answer to your question is C. It intensified sectional tensions and nullified previous compromises. This ruling declared that people of African descent, whether free or enslaved, could not be U.S. citizens and thus had no standing to sue in federal court. It also stated that the federal government had no power to regulate slavery in the federal territories acquired after the creation of the United States. This decision negated the whole concept of popular sovereignty and the regulatory measures put forward by the Missouri Compromise and the Compromise of 1850.
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