In the Parable of the Persistent Widow (Luke 18:1-8), what quality of God does Jesus emphasize through the unjust judge's eventual granting of the widow's request?

A God's reluctance to be bothered by human needs. B God's immediate and unconditional granting of all prayers. C God's responsiveness to persistent and faithful prayer, despite appearances. D God's preference for the poor and marginalized over the wealthy and powerful.