In the South, many enslaved people reacted to the Emancipation Proclamation by

joining the Confederate military.

staging work slowdowns.

relocating to the border states.

offering to become Union spies.

I believe the correct answer from the choices listed above is the first option. In the South, many enslaved people reacted to the Emancipation Proclamation by joining the Confederate military. This is because the Emancipation Proclamation freed slaves only in areas under Confederate control but not in areas that remained loyal. Hope this answers the question.