Which of the following is an example of intrastate mutual aid?
A. Cook County, Illinois, sends responders to Lake County, Illinois, to respond to a hazardous materials incident.
B. New York City Fire Department sends firefighters to respond to Hurricane Katrina.
C. Montgomery County, Maryland (a suburb of Washington, DC), sends EMS personnel to respond to a mass casualty incident in Washington, DC.
D. Paramus Fire Department in New Jersey sends firefighters to help with rescue efforts at the World Trade Center on September 11, 2001.