I think that Mrs. Auld followed her husband's advice to stop teaching Douglass to read in My Bondage and My Freedom because WIVES WERE EXPECTED TO OBEY THEIR HUSBANDS.
Douglass was a slave and according to Mr. Auld, slaves do not need to know how to read because they will not be able to perform their tasks well as a slave.
It’s either A. To inform or C. To persuade but between both I think C might be a good option
