Use the Emancipation Proclamation to answer the question. Why did Lincoln give a warning months before issuing this document? A. He hoped to persuade some Confederate states to switch sides. B. He sought to appease foreign allies and keep domestic support high. C. He wanted to give Confederate states time to prepare for the change. D. He believed that the threat might provoke an early conclusion to the war.

B. He sought to appease foreign allies and keep domestic support high.