Black Dispatches was a common term used among Union military men in the American Civil War for intelligence on Confederate forces provided by African-Americans. This source of information represented a prolific and productive category of intelligence obtained and acted on by Union forces throughout the Civil War.
The answer for your question is D
I would either say A.
Because of the fugitive slave act of 1850, Different states started abolishing slavery, the south was against this because the South had plantations and crops and it would be hard to manage all on their own. Leading to people arguing and trying to find the compromise.