How does the Apostle Paul's appeal to Philemon regarding Onesimus challenge or subvert the social norms and power dynamics of the 1st-century Roman world concerning slavery?

A Paul explicitly condemns slavery as inherently evil and demands Philemon immediately free Onesimus as a matter of Christian principle. B Paul acknowledges the legal right of Philemon to own Onesimus but appeals to his emotions to treat Onesimus with kindness and avoid physical punishment. C Paul strategically uses his apostolic authority and the language of familial adoption to advocate for Onesimus's full acceptance as a brother in Christ, subtly undermining the master-slave relationship without directly attacking the institution of slavery itself. D Paul implies that Onesimus's conversion to Christianity automatically nullifies his status as a slave under Roman law, thus legally mandating Philemon to grant him his freedom.