In the context of the early church, what was the primary theological significance of the Jerusalem Council's decision regarding Gentile converts, as described in Acts 15?

A It primarily aimed to maintain social harmony between Jewish and Gentile believers within the same congregations. B It definitively established that Gentiles had to fully adhere to the Mosaic Law to achieve salvation through Christ. C It affirmed that salvation is attained through faith in Jesus Christ, independently of adherence to Mosaic Law, thereby broadening the scope of God's grace. D It served as a temporary compromise to allow the church to grow rapidly before later requiring full adherence to Jewish customs.