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

A God's capricious nature, requiring persistent flattery to be moved. B God's inherent unwillingness to help those in need. C God's contrasting character of justice and compassion, far exceeding even the most reluctant human authorities. D God's limited power to intervene in earthly affairs.