A vehicle pulls to the left under load. Alignment measurements show the left wheel has +0.5 degrees caster and the right wheel has +1.5 degrees caster. What does this confirm?

1. The camber settings are incorrect, causing the pulling condition
2. The vehicle is pulling toward the side with less caster (the left side)
3. The toe settings are correct, indicating the tires are scrubbing
4. The thrust angle is zero, causing the pulling condition