If you hear or see an emergency vehicle approaching within you must safely pull over to the right-hand edge or curb.

If you hear or see an emergency vehicle approaching within 1000 feet, you must safely pull over to the right-hand edge or curb.

Explanation:

If an ambulance, police car, or any other emergency vehicle is approaching your vehicle, you are obliged to pull over to the right-hand edge or curb and allow it to advance without hampering its right of passage. If not, you may have to pay a fine or will be cited by the police.

answer; (d) all of the above; 100%

answer; because they must appeal to a broad cross-section of the population;