While often overlooked, what role did the 'cities of refuge' play in upholding justice and preventing blood feuds in ancient Israelite society?

A They served as centers for political debate and negotiation between warring factions. B They provided temporary sanctuary for those who accidentally caused a death, allowing time for investigation and preventing immediate retaliation. C They functioned as military outposts, protecting the borders of Israel from foreign invaders. D They were primarily religious centers, offering sacrifices and atonement for unintentional sins.