Final answer:
The correct answer is sight of and not more than 25 feet (B). The equipment has a visual range of not more than 25 feet.
Step-by-step explanation:
The correct answer is sight of and not more than 25 feet (B).
The phrase 'sight of' refers to the visual range or distance that the equipment can cover. In this case, the equipment has a visual range of not more than 25 feet.
For example, if the equipment is a camera, it means that the camera can capture clear images up to a distance of 25 feet.