Answer:
the personality and character of the slave owner.
Step-by-step explanation:
During the slavery period, the treatment of slaves were based on the personality and character of the owner and not the slave codes. The slaves during this period were abhorred and excluded from enjoying any civil rights. They were regarded as disgust and contempt. They did not have right to marry, to learn and write, etc.
But the slaves were free from these codes under those owner who had good nature. Such owners would help their slaves to learn to read and write. Example of such owner can be found in the life of Frederick Douglass, who was taught alpabets by his owner's wife, Sophia.
Thus the correct answer is option third.