Describe the Dred Scott decision. Why was it important?

Explanation:

The Dred Scott decision was the U.S. Supreme Court's ruling on March 6, 1857, that having lived in a free state and territory did not entitle an slaved person, Dred Scott, to his freedom. In essence, the decision argued that, as someone's property, Scott was not a citizen and could not sue in a federal court.

if i am correct the answer is going to be a) the federal program of reconstruction ended.