Historians generally agree that the first international slave trade in africa was

The answer is C

Explanation:

The first international slave trade in Africa was across the Sahara Desert. True, there was slavery along the Nile, but this trade involved West African societies connecting with Middle Eastern ones. These slaves were generally used as servants and soldiers, which differs greatly from the type of slavery that would be practiced during the era of the Trans-Atlantic Slave Trade.

b) the confederacy had to pay all union war expenses.

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