What would be a typical initial response to a gas leak in a building?

Answer: B — Evacuate the area and establish a safety perimeter

The initial response to a gas leak in a building focuses on ensuring the safety of all occupants and responders. Evacuating the area and establishing a safety perimeter is crucial because it minimizes the risk of exposure to potentially hazardous gases and reduces the chances of an explosion or fire. This approach prioritizes human safety by moving individuals away from the immediate danger zone while professionals assess the situation. By evacuating, emergency personnel can assess the leak safely without endangering the lives of those inside the building. Establishing a safety perimeter also allows responders to control access to the area, preventing bystanders from entering a hazardous situation while they coordinate with emergency services or the gas company. In contrast, ignoring the situation or waiting for the gas company does not address the immediate threat and can lead to escalating dangers. Investigating the source of the leak immediately could expose responders to the very gases that are hazardous. Sealing windows and doors may trap gas inside the building, increasing the risk of an explosion. Therefore, prioritizing evacuation and safety measures is the most appropriate initial response.