Here so the other guy gets brainiest :)
Answer:
A, the Soviet Union supported North Vietnam but they were the ones who attempted to take over South Vietnam and successfully did so as American Troops retreated
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.
hope this helps