Which performance policy takes precedence in WLM?（）

A. Check  /etc/hosts. 
B. Check  /etc/resolv.conf. 
C. Check for packet errors. 
D. Check to see if the master server is up.

A. The df command only counts the number of disk blocks and superblocks. 
B. The df command ignores space used for inodes, gnodes, and vnodes.
C. The du command does not take into account filesystem metadata. 
D. The du command counts indirect blocks and superblocks in its calculations.