Louisiana slave owners were able to legally work a slave: for 24 hours a day for 21 hours a day forever for only 16 hours a day

The correct answer is:<br /><br />**for only 16 hours a day**<br /><br />Under Louisiana law during the time of slavery, there were regulations that limited the amount of work a slave could be legally required to perform in a single day. Slaves could not be forced to work more than 16 hours per day. However, it is important to note that these laws were often ignored or loosely enforced by slave owners.