In relation to wall cabinets, what is the primary function of a hanger rail?

The primary function of a hanger rail is to provide a reliable and secure mounting point for wall cabinets. Hanger rails are typically installed horizontally on the wall and are designed to support the weight of the cabinets when they are hung. This ensures that the cabinets are level and properly aligned, which is crucial for both aesthetic and functional purposes.

Using a hanger rail also allows for easier installation, as it provides a continuous and stable surface to which the cabinets can be attached, rather than relying solely on anchoring to studs or other structural elements behind the wall. This method enhances the stability of the cabinets and helps to distribute their weight more evenly across the wall surface.

The other options do not accurately describe the function of a hanger rail. For example, supporting the ceiling or hanging electrical fixtures does not align with the purpose of a hanger rail in the context of wall cabinets. Additionally, while adding additional storage may be an indirect benefit of properly mounted cabinets, it is not the primary function of the hanger rail itself. Thus, the focus on securely mounting the cabinets stands out as the key reason why "to provide a mount for the cabinet" is correct.