View the Exhibit. 
The user smith needs to display the MAC address only of eth0.
Which command gives the desired output?
A.
ifconfig eth0 | awk ‘/eth0/ {print $0}’
B.
/sbin/ifconfig eth0 | awk ‘/HW/ {print $4}’
C.
/sbin/ifconfig eth0 | awk ‘/HW/ {print $5}’
D.
/sbin/ifconfig eth0 | awk ‘/eth0/ {print $4}’
Explanation: