A wall-mounted luminaire that weighs 4 pounds is permitted to be mounted to which of the following?

The correct choice indicates that a wall-mounted luminaire weighing 4 pounds can be mounted to any of the options provided. This is due to the fact that the National Electrical Code (NEC) allows luminaires to be securely mounted to boxes that meet specific weight and installation requirements.

Metal and nonmetallic boxes, as well as junction boxes, can support this weight when they are properly rated for such use. Metal boxes are typically more robust and often used for heavier fixtures, but nonmetallic boxes can also be rated for the same weight as long as they meet the necessary standards. Junction boxes are specifically designed to house electrical connections and can also be used to support fixtures that fall within the weight limitations set by the code.

Installing the luminaire in any of these types of boxes is permissible, provided that the installation adheres to the manufacturer's instructions and all applicable codes, ensuring safe and secure mounting.