An island fixture vent is installed for a kitchen sink. According to the 2022 CPC, which of the following is a requirement for the installation of an island fixture vent?

• The vent must connect directly to the building drain.
• The vent pipe must be the same size as the drainage pipe.
• The vent is not required to extend through the roof.
• The vent must extend vertically to a minimum of 6 inches above the flood level rim before offsetting.