The key to effectively managing a multiple casualty incident is to

The correct answer is D. utilize the incident command structure.

Key Concept: Incident Command System (ICS)

The most important principle in managing a multiple casualty incident (MCI) is the use of a structured command system. The Incident Command System (ICS) provides:

Organization

Clear leadership

Efficient communication

Resource management

Why D is correct:

ICS ensures that:

Roles are clearly defined (triage, treatment, transport, staging, etc.)

Resources are used efficiently

Scene operations are coordinated and controlled

NREMT-aligned guidance states:

“The Incident Command System is essential for managing mass casualty incidents.”

“ICS provides organization and structure to chaotic scenes.”

Why the other options are incorrect:

A. Defer decisions to chief officer❌ ICS begins with first arriving unit, not delayed leadership

B. Request additional resources early✔ Important, but not the key foundational principle

C. Initiate START triage immediately✔ Important step, but only one component of overall management

Exact Extracts (NREMT-aligned EMT educational references):

“Use of the Incident Command System is critical in MCI management.”

“ICS ensures coordinated response and resource allocation.”

“All operations should function within the ICS framework.”

Clinical Priority Summary:

The foundation of effective MCI management is organization through ICS, making D the correct answer.