Once overtaking has begun, circumstances arise that make it difficult to finish without causing risks; what is the driver required to do?
A)Increase speed to finish overtaking.
B)Warn the vehicle being overtaken of the risk so it stops.
C)Reduce speed and return to your lane without obstructing.Correct
# Explanation
When circumstances arise during overtaking that prevent it from being completed safely, the driver **must reduce speed and return to their original lane** without hindering the traffic of the vehicle they were going to overtake. This defensive maneuver is mandatory to avoid collisions and maintain road safety. Increasing speed or relying on signals from the other driver are prohibited and dangerous actions in this situation.