The best describes the contributions of frederick douglass during the civil war is : douglass was an abolitionist who encouraged the union to allow african american to enlist
Before his effort, the contribution of African American for the army was limited in the factory, when they labored to create military supply.
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The statement would be Slavery should be outlawed in the new country
that statement was written in the initial draft but not mentioned on the final version of the Declaration.
This is because a lot of Colonist worried that it will bring negative effect to the U.S Economy ( by U.S economy, they meant their business)
I'm not 100% sure but I think it is B
Hope this helps :)