Dred Scott was Important because he was a slave who argued to be free. Thus option 1st is correct.
The Dred Scott was the slave who went with his owner to the state called Wisconson. The Scott made the argument that He considered himself as a free person and he lived in the free state. The slavery was prohibited in that state.
Thus he became the important person and most significant decisions came out from the supreme court who decided that because Dred Scott was not a citizen, he could not file a claim for his freedom.
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