An application fails to start after a Technology Level upgrade. The application vendor recommends that two filesets upgraded as part of the new Technology Level be rejected. What is the recommended method for performing this task?（）
- ARun instfix -u to reject the filesets.
- BRun installp -r to reject the filesets.
- CRun installp -u to uninstall the filesets.
- DRestore the system to previous state from the system backup.