A nurse is assisting with the evaluation of a facility's safety plan. Which of the following indicates that the safety plan is effective?

Staff members used a class A fire extinguisher during an electrical fire

Staff members review the locations of fire extinguishers every 2 to 3 years.

An evacuation was ordered during a fire when fire extinguishers were not effective.

Fire alarms in the facility have the same sound as other alarms.