What is the theological importance of the 'Great Commission' given by Jesus in Matthew 28:19-20, beyond simply spreading the Gospel?

A It primarily emphasizes the need for believers to perform miracles and wonders as proof of their faith. B It highlights the importance of establishing a centralized religious authority to govern all churches worldwide. C It commands believers to not only preach the Gospel but also to make disciples, baptizing them and teaching them to obey all of Jesus' commands, indicating a call to holistic transformation. D It primarily focuses on gathering wealth and resources to build grand cathedrals and religious institutions.