The driver of the white vehicle wants to return quickly to the right lane because he sees a danger. What should the driver of the green vehicle do?
A)Increase speed so that he gives up performing the manoeuvre.
B)Nothing, because he has no obligation.
C)Reduce speed to facilitate his return to the lane.Correct
# Explanation
The driver of the green vehicle must **reduce speed** to allow the white vehicle to merge safely into the right lane. This is a duty of road solidarity that seeks to avoid accidents and allows the other driver to execute their manoeuvre in a controlled manner in the face of the danger detected.