The correct answers are A, B, D, and E because they reflect safe and appropriate emergency response actions aligned with CCPS guidance for handling flammable vapor releases.
Option A is critical because personnel must be evacuated immediately from areas where flammable gas is detected to prevent injury or fatality in case of ignition.
Option B is correct because isolating the source of the release (if it can be done remotely) helps stop or reduce the leak without exposing personnel to danger.
Option D is also appropriate because activating a deluge system can help disperse vapors and reduce ignition risk by cooling and diluting the flammable cloud.
Option E is correct because communication and escalation are essential parts of emergency management, ensuring proper coordination and response.
Option C is incorrect because sending personnel into a potentially flammable atmosphere is dangerous. CCPS strongly discourages exposing workers to hazardous conditions during an active release , especially when safer remote methods are available.
Overall, CCPS emphasizes protecting personnel first, controlling the hazard remotely, and using engineered safeguards , while avoiding unnecessary exposure during emergencies.
