Within the symbolic framework of the Tabernacle and later the Temple, what was the primary purpose of the bronze laver (basin) located in the courtyard?

A It was used by the priests for ritual washing and purification before entering the Holy Place. B It was used to collect rainwater for the congregation's drinking supply. C It served as a decorative element, symbolizing the beauty of God's creation. D It was a container for storing the ashes of burnt offerings, representing atonement for sins.