In the IP mobile communications process, which of the following is the THIRD step?

Question $10$ options:

a$)$

The Correspondent Node $($CN$)$ sends a message to the MN

b$)$

The FA assigns COA to MN

c$)$

The FA sends the Care of Address $($COA$)$ to the Home Agent $($HA$)$

d$)$

The Mobile Node $($MN$)$ connects to the Foreign Agent $($FA$)$