To enable a tty port to be used for a cu session what must be done to the system?

To enable a tty port to be used for a cu session what must be done to the system?

A.
smit tty; take the defaults and create the desired tty

B.
In the /etc/uucp Devices add a line similar to: Direct ttyX – 9600 direct

C.
Install bos.net.uucp and the first available tty will be configured for use by a cu session

D.
Run the Asynchronous Terminal Emulation (ATE) program and it will configure a tty port for a cu session