Based on the illustration showing freed people with Union Army soldiers, what assumption is the artist making about the effects of the Emancipation

Proclamation?
A. Former slaves would fight for the Union Army against the South
B. Former slaves would welcome the arrival of the Union army
C. Former slaves would not be allowed to live in the North.
D. Former slaves would continue to be enslaved in the North

B. Former slaves would welcome the arrival of the Union army