What is a “critical control” and how is it used?

What is a “critical control” and how is it used?

• A. A control that is optional and cosmetic.
• B. A control that eliminates all hazards immediately.
• C. A control that prevents or mitigates a hazard to an acceptable level; monitored and tested to ensure it remains effective.
• D. A control that only teaches theory.

Answer: (C)