What were the three options that were presented to end slavery prior to the Civil War?

Just before the Civil War, there were 19 free states and 15 slave states. During the war, slavery was abolished in some of these jurisdictions, and the Thirteenth Amendment to the United States Constitution, ratified in December 1865, finally abolished slavery throughout the United States. We know that the Civil War and the Emancipation Proclamation were significant causes that led to the end of slavery, but what is not often recognized is that there were many, many smaller events that contributed to abolition.

Explanation:

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