Which of the following is NOT a command option available for an emergency incident?

The correct answer highlights that "Rescue operations" is not classified as a command option for managing an emergency incident. In the context of incident command, various strategies or approaches are employed to effectively address the situation at hand.

Investigation, fast attack, and establishing a command post are recognized command options because they dictate the initial approach and organization of the emergency response. Investigation involves assessing the situation to gather necessary information before making operational decisions. Fast attack refers to a rapid response designed to mitigate an immediate hazard quickly, while a command post serves as the coordination hub for incident management, enabling effective communication and resource allocation.

In contrast, "rescue operations" typically fall under the broader tactical operations carried out during an emergency response rather than a command option itself. This term refers to the specific activities undertaken to locate and assist victims, which is a tactical response rather than a strategic command purpose. Therefore, identifying it as not a command option is appropriate within the framework of emergency management.