What is meant by the motorcycle concept of 'lane positioning' (pozicija u traci) for safety?

1. Selecting the left, center, or right third of the lane to maximize visibility, create safety cushions, and avoid surface oil
2. Always remaining strictly in the dead center of the lane regardless of conditions
3. Riding exclusively on the far right edge of the road next to the curb at all times
4. Weaving continuously across the lane from left to right to entertain other drivers