If, due to particularly serious circumstances, a driver transports a sick person in their private vehicle, how should they warn of their presence?
A)Waving the arm up and down with short, quick movements.
B)Installing a special light signal on the roof of the vehicle.
C)Sounding the horn and turning on the emergency lights.Correct
# Explanation
When a driver transports a sick person under serious circumstances, they must warn of their presence using **clear and universal signals**: the horn (to alert with sound) and emergency lights or hazard indicators (to be visible). These signals are recognized by all drivers and comply with road safety regulations, allowing other road users to give way or exercise extra caution.