What should a Class E driver do when leaving an animal-drawn cart temporarily parked or unattended on the side of a rural road?

1. Leave the horse completely untied in the center of the road
2. Park fully off the roadway on the shoulder, apply the mechanical wheel brakes, place wheel chocks, and securely tie the draft animal to a solid hitching post (or hobble safely) away from moving traffic
3. Let the horse graze across both traffic lanes
4. Leave the cart blocking an active lane