Fire extinguishers not exceeding 40 pounds should be installed no more than:

The correct choice indicates that fire extinguishers weighing up to 40 pounds should be mounted no more than 5 feet above the floor. This guideline is important for accessibility during an emergency situation. By having extinguishers at this height, individuals can quickly and easily reach them without straining or having to use additional equipment to retrieve them.

This height is also in line with safety regulations and best practices, ensuring that the extinguishers remain within reach for most individuals, thereby enhancing the chances of successfully extinguishing a small fire before it escalates.

While other options may seem plausible, the specific height of 5 feet strikes a balance between visibility and accessibility, making it the standard for such equipment. Ensuring that fire safety equipment is within appropriate reach is critical in emergencies, where every second counts.