The correct answer is C.
Slave work songs helped the slaves move together and pass the time.
They were a way for the slaves to help each other, maintain morale, and cope with the difficult and tedious labor. The songs were not just for fun or entertainment. They did not help the slave owners locate the workers or teach the slaves English. The purpose was to help the slaves synchronize their movements, set a steady pace, and make the hard work more bearable through song.