What should a Class E driver do when approaching a railway crossing with lowered barrier arms and flashing red lights?

1. Slalom around the lowered barriers before the train arrives
2. Stop completely before the stop line and barrier gate, maintain a firm hold on the horse's reins to keep the animal calm as the train rushes past, and wait until the train has passed and the barriers have fully raised before crossing
3. Unhitch the horse and leave the cart under the barrier
4. Honk or whistle at the train to make it stop