What should the driver of a vehicle do if, due to emergency reasons, it is immobilized inside an underpass?
A)Remain inside the vehicle.
B)Immobilize the vehicle as close as possible to the left edge of the roadway.
C)Request help through the nearest emergency post, if one exists.Correct
# Explanation
When a vehicle is immobilized in an underpass due to an emergency, the driver must **immediately request help** through the nearest emergency post if available. This action is essential to ensure road safety, since underpasses present special risks due to congestion and limited visibility. The emergency post will allow authorities to act quickly to clear the road and prevent accidents.