A multiple-casualty incident is MOST accurately defined as an event in which:

A) mutual aid from other agencies is required to care for numerous patients.
B) there are at least 25 patients, more than half of whom are critically injured.
C) the number of patients exceeds the resources available to the initial responders.
D) there are more patients who require advanced life support than patients who do not.

Answer: C) the number of patients exceeds the resources available to the initial responders.