In the Parable of the Persistent Widow (Luke 18:1-8), what is the primary theological point Jesus is making about prayer, considering the unjust judge's character?

A God, like the unjust judge, is initially unwilling to answer prayer but will eventually relent if we persist long enough. B Prayer should be offered only when we are facing injustice, as exemplified by the widow. C Even a corrupt and uncaring judge can be moved by persistence, so how much more will a righteous and loving God respond to the persistent prayers of His people? D The parable teaches that God is always just and will always answer prayer in the way we expect, if we only pray with enough faith.