Final answer:
The correct behavior when being passed is to maintain speed and move to the right side of the road, allowing the other vehicle to safely overtake.
Step-by-step explanation:
The question concerns appropriate driving behavior when another vehicle is overtaking or passing. The correct response is: Maintain speed and move as close as possible to the right side of the road. This ensures that you are not accelerating into the path of the vehicle attempting to pass, and by moving to the right, you are providing as much space as possible for the other vehicle to safely overtake.