The answer is D. Look in common symbols.
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.
