In the Incident Management System, the term modular organization is best described as which?

• A. When multiple agencies or jurisdictions have responsibility for control of an incident.
• B. Each person has only one direct supervisor.
• C. The ability to start small and expand if an incident becomes more complex.
• D. The number of subordinates who report to one supervisor at any level within the organization.

Answer: (C)

The main idea here is scalability in the Incident Management System. Modular organization means you can start with a small, simple command structure and add more sections, units, or branches as the incident grows in complexity, without redefining the whole setup. This flexibility keeps the organization efficient and appropriately sized for the situation—you’re not over-building a response that doesn’t yet need it, and you’re not under-preparing for a larger event.

That flexibility is what makes this description the best fit. In contrast, having multiple agencies sharing control describes unified or multi-agency coordination, which is about coordination across organizations rather than how the incident organization itself expands. Unity of command refers to each person reporting to only one supervisor, which is about clear reporting relationships, not how the structure scales. Span of control concerns how many subordinates a supervisor oversees, which is a rule of thumb for supervision, not the method of expanding the organization as needs change.