Which TWO of the following commands could be used to add a second IP address to eth0?

Which TWO of the following commands could be used to add a second IP address to eth0?

A.
ifconfig eth0 – add ip 192.168.123.10

B.
ifconfig eth0:1 192.168.123.10

C.
ifconfig eth0 1 192.168.123.10

D.
ifconfig eth0 +192.168.123.10

E.
ifconfig eth0:sub1 192.168.123.10