The answer is falls. The quantity demanded falls. Hope this helps:)
Most black soldiers were scattered throughout the Continental Army in integrated infantry regiments, where they were often assigned to support roles as wagoners, cooks, waiters or artisans. African Americans also served as gunners, sailors on privateers and in the Continental Navy during the Revolution.
African-Americans fought for both sides, providing manpower to both the British and the revolutionaries.
imagine you are a king/queen and its time for you to step down as reining monarch, your mother and father are your predecesors and therefore your son or daughter would be heir, normally its the first born child