Final answer:
When driving a vehicle with a light medium trailer attached, you should always allow for the added length of the trailer when you change lanes. This ensures safe maneuvering. Therefore, the correct option is A) always allow for the added length of the trailer when you change lanes.
Step-by-step explanation:
When driving a vehicle with a light medium trailer attached, you should always allow for the added length of the trailer when you change lanes. This means checking your blind spots and giving yourself extra space to maneuver.
Keeping your following distance to 1,000 feet is not necessary. The general rule is to maintain a three-second following distance between you and the vehicle in front of you.
Sharp turns with a trailer attached can be challenging and may put stress on the trailer and towing vehicle, so it is best to make gradual turns.
Driving below the speed limit may not always be required when towing a trailer, but it is recommended to drive at a safe and appropriate speed based on road conditions, visibility, and the capacity of your towing vehicle.
Therefore, the correct option is A) always allow for the added length of the trailer when you change lanes.