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

A God's willingness to be manipulated by persistent prayer. B God's eventual weariness of hearing the prayers of the faithful. C God's inherent justice and responsiveness to the cries of those who are oppressed. D God's indifference to the suffering of individuals until they demonstrate unwavering faith.