The word "Renaissance" literally means rebirth or revival. This period of history was heavily inspired by society's renewed interest in classical (namely Greek) culture, particularly art, learning, and literature. Therefore, the most fitting answer for this question would be A. Hope this helps.
It sounds like Fredrick Douglass was pointing out that slave masters didn't want their slaves to have knowledge such as reading and writing, let alone knowing their own ages and such.
Most slave masters wanted this so that they could feel superior over blacks, and they didn't want the slaves to be equal with them.
Try reasoning with them, be true and honest and explain what they are about beforehand.