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

A God's indifference to human suffering, requiring constant nagging to act. B God's inherent corruption, mirroring that of the unjust judge. C God's just and compassionate nature, contrasting sharply with the unjust judge, and His willingness to answer the persistent prayers of His people. D God's limited power, requiring human intervention to achieve justice.