The correct answer is B. Prevent soldiers from the South from selling captured African American soldiers.
Explanation
Hannah Johnson was the mother of an African American soldier who fought in the American Civil War at Fort Wagoner. Hannah became popular for having written a letter to President Abraham Lincoln requesting that African American soldiers captured by the rebels (Confederate soldiers) were not sold for enslavement arguing that no man can possess another as an object. So the correct answer is B. Prevent soldiers from the South from selling captured African American soldiers.