An application writes to a log file in the /logs filesystem that is full. After the log file is deleted, 'df' still shows the filesystem as 100% full. What is the likely cause of the problem and what will resolve it?（）

• A、The deleted file is still open by the application.The system must be rebooted before'df' will show the reduction in the filesystem.
• B、The deleted file is still open by the application.The application must be stoppedbefore 'df' will show the reduction in the filesystem.
• C、The filesystem is still marked as full in the /etc/fs.status file.The system must be rebooted before 'df' will show the reduction in the filesystem.
• D、The filesystem is still marked as full in the /etc/fs.status file.The application must be stopped before 'df' will show the reduction in the filesystem.