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单项选择题

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 stopped before ‘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.

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