In the book of Philemon, what underlying principle of Christian fellowship does Paul attempt to demonstrate through his appeal regarding Onesimus, the runaway slave?

A The importance of maintaining social hierarchies and respecting the master-slave relationship. B The superiority of Roman citizenship over Philemon's status. C The transformative power of Christ to reconcile individuals as equals in the body of Christ, transcending social and legal status. D The need for Onesimus to compensate Philemon for his lost labor.