How does the parable of the Persistent Widow (Luke 18:1-8) challenge the common understanding of prayer in the New Testament era, and what does it reveal about God's character?

A It suggests that God is initially unwilling to answer prayers and must be persuaded through persistence. B It emphasizes the importance of praying loudly and publicly to gain God's attention. C It illustrates the need for unwavering faith and perseverance in prayer, reflecting God's desire to see genuine dependence and trust. D It teaches that prayer is only effective if accompanied by acts of charity and good deeds.