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

A God's indifference to human suffering, requiring relentless appeals. B God's eventual weariness and capitulation to persistent prayer. C God's willingness to grant justice quickly and readily to those who cry out to Him. D God's capricious nature, granting favors based on whim rather than righteousness.