Most enslaved people who learned to read and write gained that knowledge from slaveholders’ wives. in plantation schools. on their own, in secret. from abolitionists in cities.

If I understand your question correctly, I would think it would be on their own.

On their own, in secret. C.

The case was a u.s. supreme court decision that defined the scope of the u.s. congress's legislative power and how it relates to the powers of american state legislatures. the dispute in mcculloch involved the legality of the national bank and a tax that the state of maryland imposed on it.