/var filled up, and even though you delete some large files, /var immediately fills up again. Apparently, some process is writing to a file in /var at high speed.

You use /bin/find to search for a large and recently changed file in /var, but nothing shows up.

What is the reason?

A.
The file name starts with a ‘.’, so it is hidden.

B.
The file is a soft link to a file on another file system.

C.
The file is a hard link to a file on another file system.

D.
The file has been deleted, but is still opened by a process.