In the Dred Scott case, the Supreme Court decided

Athe Compromise of 1850 was illegal because it was illegal for Congress to deprive a slave owner of property (slaves) without the due process of law.

Bthe Missouri Compromise was illegal because it was illegal for Congress to deprive a slave of his or her freedom if they lived in the South.

Cthe Missouri Compromise was illegal because it was illegal for Congress to deprive a slave owner of property (slaves) without the due process of law.

Dthe Missouri Compromise was illegal because it freed slaves in the slave states.v