The first step when arriving at a crash scene is to summon help, ensuring that emergency services are notified for professional assistance. While it may be tempting to provide first aid immediately, it is critical to prioritize safety and access to qualified medical care. Therefore, the correct choice is option B: Summon help or send someone for help if you can.
;
The first action to take when encountering a crash is to summon help, as emergency responders are needed for proper medical care. Ensuring safety and calling for professional assistance is crucial before administering first aid. This approach facilitates a better outcome for the injured person. ;