What was the purpose of the city of refuge in ancient Israelite law, as described in Numbers 35, and what does it reveal about their understanding of justice and atonement?

A It served as a military stronghold to protect against enemy attacks. B It was a place for debtors to escape from their creditors. C It provided temporary sanctuary for someone who had accidentally caused a death, allowing them to avoid blood vengeance. D It functioned as a center for religious festivals and celebrations.