Which of the following was specifically permitted by the Emancipation Proclamation?

Which of the following was specifically permitted by the Emancipation Proclamation?

A. Free African Americans were allowed to fight for the Confederacy.
B. Free African Americans were allowed to enlist in the Union army and navy.
C. Enslaved people in border states were allowed to move to the North.
D. Enslaved people in border states were allowed to become Confederate citizens.