Which five methods，inserted independently at line 5，will compile？（）
- Apublic int blipvert（int x）{return 0；}
- Bprivate int blipvert（int x）{return 0；}
- Cprivate int blipvert（long x）{return 0；}
- Dprotected int blipvert（long x）{return 0；}
- Eprotected long blipvert（long x）{return 0；}
- Fprotected long blipvert（int x， int y）{return 0；}