What is the primary symbolic meaning behind the 'valley of dry bones' vision in Ezekiel 37?

A The literal resurrection of all deceased Israelites at the end of days. B The hopeless and spiritually dead state of the exiled Israelites, and God's promise to restore them. C A warning against the dangers of physical death and the importance of burial rituals. D A prophecy about a great plague that will devastate the land of Israel.