While reducing a file system, an administrator receives the following error message:
root@aixserver:/home/root# df -k /var
Filesystem 1024-blocks Free %Used Iused %Iused Mounted on /dev/hd9var 3538944 2686256 25%
14370 3% /var root@aixserver:/home/root# chfs -a size=-512M /var
chfs: There is not enough free space to shrink the file system.
What is the most likely cause of the problem?

A.
The jfs2log is corrupt.

B.
The bos.rte.filesystem fileset is broken.

C.
The file system cannot be reduced by a multiple of 512 megabytes.

D.
The df command does not reflect fragmentation or the size of the metadata.