Which of the following is the effect of typing this on a machine that already has an address of 192.168.155.1 assigned to eth0?

A user typed the following command on a machine:
ifconfig eth0:1 192.168.155.5 up

Which of the following is the effect of typing this on a machine that already has an address of 192.168.155.1 assigned to eth0?

A.
The current IP address will be replaced with 192.168.155.5.

B.
The gateway address will be replaced with 192.168.155.5.

C.
The address of 192.168.155.5 will be assigned to the second physical NIC.

D.
192.168.155.5 will be assigned to eth0 as a second IP address.