Which of the following commands indicates the available state of a physical adapter？（）

A.lsattr
B.route
C.netstat
D.ifconfig

A.lslpp
B.lsdev
C.lscfg
D.lppchk

A.A routing table has changed
B.The IP address has changed
C.The system has become a gateway
D.A hacker is posing a threat to the system