The Supreme Court’s ruling in the Scott v. Sandford case declared which of the following was unconstitutional?
the Compromise of 1850
the Kansas-Nebraska Act
the Fifth Amendment
the Missouri Compromise

The Missouri Compromise

Explanation:

This is because the Compromise separated the north and the south, and it said everything up in the north is free, and Scott said he once lived in the North with his master which made him free.

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clean air is essential for health and survival

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clean air supplies oxygen that enables living organisms to breathe

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answer; conflict perspective;