How does the parable of the Two Sons (Matthew 21:28-32) challenge the prevailing understanding of righteousness held by the religious leaders of Jesus' time?

A It emphasizes the importance of familial obedience over personal conviction. B It suggests that outward religious observance is sufficient for salvation. C It implies that true righteousness is demonstrated through obedience, even if it comes after initial resistance, contrasting with those who outwardly profess obedience but ultimately disobey. D It promotes the idea that all people, regardless of their actions, are equally loved by God.