Which of the following commands should be used to assure that a dump can be forced using the reset button on a system without a key switch?（）

A. route 
B. netstat 
C. iptrace 
D. traceroute

A.Syslogd creates error log entries in the system error log. 
B.The default error log is stored in /var/adm/ras/error.log. 
C.All entries in the error log are related to software problems. 
D.Error logging is automatically enabled during system initialization.

A. find /var/spool/lpd/qdir -mtime -7 -type f -exec rm -f {}\
B. find -name /var/spool/* -f rm {}\
C. find -name /var/spool/lpd/* -exec rm {}\
D. find /var/spool/lpd/qdir -mtime +7 -type f -exec rm -f {}\