Thinking about Grendel, I think 'A' is most likely.
I think the answer is B. Alliteration
1,)The 9-1-1 operator receives and distributes information which goes toward the police officer or EMT. They will give a vivid description on the crime scene or emergency situation and report it to the right organization to handle it.
2.)The police officer keeps order and discipline in such as domestic disputes, harassment ETC. They will order in units if in dire need of backup with any hostile targets.
3.)The firefighter also receives information from the 9-1-1 operator on the location, status of the fire, survivors ETC.
4.) The paramedic receives information from the 9-1-1 operator and report to the scene to retrieve any injured patients and transport them to the hospital for emergency medical care
(The roles and duties of each operation consists of human and health services which caters to the civilians in their well-being and care. The operator receives and sends information from the ones who are in distress and reports to the EMT's to go and provide help for them. The Paramedic revives or sustain any blood-loss/ pain/ or disdain to keep the patient alive until they reach the hospital.)
The piece of equipment that saves his life is in fact his woven mail shirt.
(Sources: http://csis.pace.edu/grendel/projf981d/analysis.html)
