The best answer between all the possibilities is 4) They slowed down their work production or did not work. As the war grew in scope and duration, however, enslaved African Americans took advantage of the turmoil created by the war to run away, engage in sabotage, to serve as a guide and join the Union war effort, or pursue their own interests. Also, they slowed down their work product or did not work, as some plantation-owners confessed.