When ATC clears an IFR aircraft for a visual approach, which responsibility does the pilot accept after reporting the required visual reference?

1. To maintain the required visual reference and continue visually while complying with the clearance; ATC continues the services and separation required for the airspace and traffic situation.
2. The pilot may ignore the assigned runway and land anywhere on the aerodrome.
3. The IFR flight automatically becomes VFR and all ATS service ends.
4. The controller transfers obstacle avoidance to another aircraft.