How does the concept of 'fulfillment' in Matthew's Gospel, particularly his use of Old Testament prophecies, contribute to his overall portrayal of Jesus as the Messiah?

A It emphasizes Jesus' rejection of Jewish law and tradition, establishing a completely new covenant. B It primarily serves to demonstrate Jesus' miraculous powers and ability to perform signs. C It highlights Jesus' continuity with Israel's history and scriptures, demonstrating his legitimacy as the promised King. D It aims to prove that Jesus was a political revolutionary destined to overthrow Roman rule.