The primary purpose of rescue chairs during an evacuation is to help individuals who cannot walk navigate down stairs. These devices are specifically designed to provide safe and efficient transportation for individuals with mobility challenges during emergencies, particularly when standard exits are inaccessible or unsafe due to smoke, fire, or other hazards.
Rescue chairs are equipped with features that allow them to be maneuvered down staircases, ensuring that those who are unable to walk can be evacuated quickly and with minimal risk. This is essential in emergency situations, where every second counts, and the safety of individuals with mobility impairments must be prioritized.
While other options mention aspects of evacuation and assistance, they do not capture the critical function of rescue chairs in facilitating the movement of individuals who cannot walk, making option C the most accurate and relevant choice.