An ornate poster shows the text of the Emancipation Proclamation under a portrait of Abraham Lincoln which is flanked by two U.S. flags and two statues. At the top of the poster is an eagle carrying arrows in one talon, and a shield and olive branches in the other.
Use the image to answer the question.
What did the document shown in this image do?
A. freed African American slaves in the Union slave states
B. freed African American slaves in the Confederate states
C. freed African American slaves in both the Union and Confederacy
D. freed African American slaves in Confederate states captured by the Union