In the Parable of the Persistent Widow (Luke 18:1-8), what aspect of God's character does Jesus emphasize through the contrast with the unjust judge?

A God's unwillingness to be bothered by human needs. B God's eventual weariness and surrender to persistent prayers. C God's inherent justice and readiness to answer the cries of those who call on Him. D God's preference for certain individuals over others in answering prayers.