Beyond its role as a vessel for carrying the Ark of the Covenant, what other significant function did the tabernacle serve, as described in detail within the Book of Exodus?

A A military headquarters for Joshua's campaigns. B A model of the cosmos, reflecting God's created order and serving as a place of divine-human intersection. C A treasury and bank for the Israelite nation, holding tithes and offerings. D A school for training Levites in music and priestly duties.