<span>The U.S. initiated a military quarantine.</span>
Answer:
Explanation:
In Dred Scott v. Sandford (argued 1856 -- decided 1857), the Supreme Court ruled that Americans of African descent, whether free or slave, were not American citizens and could not sue in federal court. The Court also ruled that Congress lacked power to ban slavery in the U.S. territories.
Answer:
It was more urbanized and attracted many more European immigrants. The northern economy was more diversified into agricultural, commercial, manufacturing, financial, and transportation sectors. In contrast, the South had smaller and fewer cities and a third of its population lived in slavery.
Explanation:
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it is b. Harriet Tubman was an abolitionist.
Because they belived the Manchos Dynasty had lost the Mandate of Heaven
