When approaching a curve to the left, why should a motorcycle rider position themselves toward the right-hand third of their lane during entry?

1. It maximizes forward sight distance around the curve and prevents the rider's leaning head from crossing into the oncoming lane
2. It allows the rider to ride on the dirt shoulder for better traction
3. It prepares the motorcycle for an immediate right turn off the road
4. It reduces tire wear on the left sidewall