Answer:C )On-scene
Step-by-step explanation: ICS is referred as the Incident Command System .These are the methods that are provided for the controlling of the emergency situation. These solutions work on the time of the current situation of emergency by commanding and the coordination.
The other options are incorrect because they don't provided the solution for the emergency situation at on-scene time rather work in the later time or off -site.Thus, the correct option is option(C).