When on an interstate highway, you should:

• Not speed up and slow down unnecessarily.
• Maintain a constant speed and keep a safe pace with other traffic without exceeding the speed limit
• Not drive too slowly as to impede the normal traffic flow
• All of the above
  Explanation:

  "Speeds on rural interstates are generally higher than on other roads. While it’s important to keep pace with traffic, do not exceed the posted speed limit to match the flow. Maintain a constant speed and safe distance, avoiding unnecessary acceleration or deceleration. Remember, driving too slowly can be dangerous and is against the law."