Final answer:
Option C, 'Remain standing even when you cannot see your feet,' violates a rule of personal safety as one should always be aware of their footing to avoid potential hazards, especially in dangerous situations like firefighting.
Step-by-step explanation:
Among the options provided, violating a rule of personal safety is: C. Remain standing even when you cannot see your feet. In scenarios such as firefighting, a person must always be able to see where they are stepping to prevent injury from unseen dangers such as falling through weak structures or stepping on hazardous objects. This rule of personal safety is essential, especially when considering scenarios such as working in a fire, which involves navigating through smoke-filled rooms where visibility is poor. It's critical for a firefighter to assess fires and situations and maintain personal safety while rescuing victims and administering first aid.
Other safe practices include working in pairs or teams, thoroughly searching one area before moving on, and identifying more than one exit before entering a hazardous environment. Firefighters must also dress with appropriate equipment, such as fire-resistant clothing and breathing apparatus, to protect themselves from the immediate dangers of fire. Remembering to locate safety equipment, such as a fire extinguisher and an eyewash station, is crucial when considering laboratory safety rules.