If dazzled by low sun or headlights, what is the safe response?

1. Use main beam against oncoming headlights so both drivers can identify the road edge sooner
2. Reduce speed as needed, increase the gap and avoid fixing your eyes on the glare source
3. Focus on the left road edge while maintaining speed, even when other hazards become less distinct
4. Lower the sun visor fully and maintain speed even when it blocks part of the forward view