The correct option is C.
Mr Auld was very cross with his wife when he caught her teaching Douglass how to read ABC. He told her that is against the law to teach a slave to read and beside, a slave who know how to read will not be satisfied with been a slave anymore and thus will not be useful to anybody. This means that, a slave master will no longer be able to hold down a slave who knows how to read.
How do you expect someone to answer this without the passages you refer to?…
I think you did really good this was a really eye opening topic really the only thing I have to say is you might want to change to summarize to to conclude it sounds more appealing other than that I don't really have any corrections.