Considering the Parable of the Friend at Midnight (Luke 11:5-8), what aspect of prayer does Jesus emphasize through the character of the persistent friend?

A Prayer should be brief and concise to avoid bothering God. B Prayer should be offered only at specific times of day, like midnight. C Prayer should be bold, persistent, and confident in God's willingness to answer. D Prayer should be reserved for only the most urgent and critical needs.