Three vehicles (A, B, C) meet at an uncontrolled four-way crossroad: Vehicle A is going straight, B is to the right of A going straight, and C is to the right of B turning right. In what exact order do they pass?

1. Vehicle A first, then Vehicle B, then Vehicle C
2. Vehicle B first, then Vehicle A, then Vehicle C
3. All three vehicles may proceed at the same time
4. Vehicle C first, then Vehicle B, then Vehicle A