Which of the following statements is true?
1) Horses have poor side vision and are easily frightened by loud noises or sudden movements.
2) When an animal is seen in the road or on the road shoulder, you should slow down and, if necessary, yield the right-of-way.
3) Often an animal's eyes shining in the headlight beams will be seen before the rest of an animal is visible at night.
4) all of the above