问题：

[单选]

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.