Which of the following WLM commands should be used to monitor performance on a system running wlm？（）

A. errpt -c
B. tail -f /var/adm/ras/errlog
C. syslogd -d
D. /usr/lib/errdemon -s 8192

A. bos.perf
B. bos.acct
C. bos.adt.samples
D. perfagent.tools

A. /usr/bin/errpt -d H 30
B. /usr/sbin/errclear - J H 30
C. /usr/bin/errclear -d H 30
D. /usr/sbin/errclear -j H 30