Respuesta :
B)
This is because as a result of the Emancipation Proclamation, the Union’s goal was now to free slaves along with preserving the Union. The slaves in the Southern states began to flee North toward freedom too. Lastly, the public in Europe supported the Union, so the leaders of those countries turned against the Confederate States.
Answer: The correct answer is C) it led to mass movements of slaves out of "border states".