In the Parable of the Persistent Widow (Luke 18:1-8), what is the primary theological point Jesus is illustrating through the widow's repeated appeals to the unjust judge?

A God will only answer prayers that are repeated multiple times with great persistence. B Even unjust authorities can eventually be swayed by persistence; therefore, believers should never give up praying. C God is unlike the unjust judge; He is just and will answer the cries of His people speedily and righteously. D Widows are particularly favored by God and their prayers are more likely to be answered.