How does the Apostle Paul's appeal to Philemon regarding Onesimus challenge or subvert the social norms and power structures prevalent in the Roman world of the 1st century?

A By advocating for a violent overthrow of the Roman government to abolish slavery. B By suggesting that Philemon should publicly denounce the institution of slavery to incite social unrest. C By appealing to Philemon's love and faith, urging him to receive Onesimus not as a slave but as a brother in Christ, thereby undermining the master-slave dynamic with a new spiritual equality. D By encouraging Onesimus to flee to another city and start a new life, effectively condoning the act of running away.