Final answer:
Creating barriers and implementing traffic calming measures are crucial for scene safety to protect emergency responders, victims, and the public.
Step-by-step explanation:
Creating barriers, work zones, and traffic calming processes are essential and should be the first priority for C) Scene safety. These measures are critical in ensuring the safety of emergency responders, accident victims, and all other individuals present at the scene of an incident. Efficient scene safety strategies prevent additional injuries and accidents, facilitate the work of emergency services, and protect the public.