Answer: B. The work was cruel and inhumane.
Explanation:
Slaves were often subject to work that was too cruel and inhumane to be given to humans of higher social standards. They were forced to work in weather conditions that would be detrimental to a human's health and were subjected to working hours that left little time for rest.
Coupled with this was physical and mental abuses in terms of beatings and intimidation that made the work much harder to do. This is why slave work was said to be grueling.
