What kind of treatment does Douglass say the African American troops will receive?

There are three main things Equal pay, promotions, retaliation when they were captured and killed

Explanation: Treatment of African American soldiers during the Civil War was an issue of concern to Douglass. On his first-ever visit to Washington, D.C., in August 1863, he met with President Lincoln to discuss three issues related to African American soldiers: (1) equal pay, (2) access to promotions when these soldiers performed bravely, and (3) retaliation against the south when captured African American soldiers were killed. Remembering the meeting years later, Douglass said:

i believe your answer is d)