To add a TTY Terminal to Serial port 1， which of the following set of options should be chosen？（）

A.tty rs232 Asynchronous Terminal then sa1 Available 01-S2 Standard I/O Serial Port
B.tty rs422 Asynchronous Terminal then sa1 Available 01-S2 Standard I/O Serial Port
C.tty rs232 Asynchronous Terminal then sa0 Available 01-S1 Standard I/O Serial Port
D.tty rs422 Asynchronous Terminal then sa0 Available 01-S1 Standard I/O Serial Port