What method helps prevent unauthorized access to the scene by keeping people at a distance?

• A. Barriers should be installed to separate responders from the public.
• B. Keep unauthorized people away using barriers to prevent access.
• C. Allow authorized personnel only to pass without checks.
• D. Simply place caution tape around the area and do nothing else.

Answer: (B)

The main idea is to create a clear, physical boundary that keeps unauthorized people at a safe distance from the hazardous scene. Using barriers to prevent access establishes a defined exclusion zone, which reduces exposure risk for the public and prevents interference with responders’ operations. Barriers are visible and enforceable, making it harder for bystanders to ignore the boundary and wander into the area. In contrast, relying on only tape or loose permissions without checks isn’t reliable enough to stop entry, and simply separating responders from the public doesn’t prevent bystanders from crossing into the scene. So, implementing barriers to keep unauthorized people away and prevent access is the best approach.