A system administrator thinks that a filesystem may be full and that is what caused the machine to crash. Which command will show the administrator if they are correct?（）

A. Add the following line to /etc/netsvc.conf: hosts = nis,bind,local 
B. edit /etc/netsvc.conf to add the following: process /full/path/of/process \{ hosts = local,nis,dns} 
C. In an NIS and DNS environment, NIS takes precedence over DNS in this environment resulting in no change 
D. Change the NSORDER environment variable 

A. Schedule enough down time to backup, upgrade and reboot. 
B. Backup, upgrade, then schedule enough down time to reboot the system. 
C. Backup, then schedule enough down time to upgrade and reboot the system. 
D. No scheduling processes are necessary because no down time is required.

A. /var 
B. /var/adm 
C. /var/perf 
D. /var/spool