What did Lincoln predict would happen with regard to slavery in the US?

The nation would go to war over the issue.

Eventually, slavery would become legal – or illegal – everywhere.

Slavery would be abolished in the nation.

He believed that slavery would either become completely legal, or completely illegal, as the nation couldn't survive divided as it was. So, the second option.

B.Eventually, slavery would become  legal – or illegal – everywhere.

Explanation:

im sorry i dont know a lot of this but ill try my best

h,c.b.e.d.f.a.g

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