Which two commands can help troubleshoot the networking?

Networking is not working for several guests on a particular host. Which two commands can help
troubleshoot the networking?

A.
xm list -1 will show all of the network interfaces for all of the virtual machines, which can be used
to see which bridge is having problems.

B.
config_network.py -l will show which network interfaces are in use, and which are having
problems.

C.
brctl show will show the status of each bridge, and which VIFs are connected to it. This canthen be
used to determine which bridge is having problems.

D.
System-config-network will list the virtual interfaces, which can be inspected to see which
arehaving problems.

E.
ifconfig -a will show a list of all network interfaces and their current status, which will help
determine which bridge is having problems.