When driving in the right lane on a highway, what should you do to stay attentive to cars merging onto the highway from entrances?

• Speed up to pass the merging cars quickly.
• Maintain a constant speed and ignore merging traffic.
• Be prepared to adjust your speed or change lanes to allow merging cars to enter safely.
  Explanation:

  "When driving in the right lane on a highway, you should be prepared to adjust your speed or change lanes to allow merging cars to enter safely."
• Move to the left lane as soon as you see merging traffic.