Where should fire extinguishers be located for adequate coverage?

The correct choice emphasizes the importance of placing fire extinguishers in a manner that provides adequate coverage and accessibility during a flame effects performance. Locating extinguishers on opposing sides of the setup ensures that regardless of where a fire may break out, there is a nearby extinguisher available to respond to the situation quickly. This strategic positioning enhances safety for both performers and the audience, facilitating a more effective response to emergencies.

In contrast, having extinguishers only in limited areas such as backstage storage, the main entrance, or the main control room would not provide sufficient access across the entire performance area. These placements could potentially delay response times, putting people at greater risk should an incident occur far from these specific locations. Therefore, the practice of situating extinguishers at opposing sides directly supports the guidelines established in NFPA 160 regarding safety precautions for flame effects in public performances.