When encountering cattle, horses, or stray livestock grazing along or crossing a highway in Bhutan, what should a driver do?

1. Sound the horn loudly and accelerate to frighten the animals off the road
2. Slow down significantly, give the animals wide clearance, and pass slowly without revving the engine or aggressive horn use
3. Flash high-beam headlights rapidly to force them to run
4. Drive immediately between the animals at normal cruising speed