Why Is this occurring?

An engineer is using the configure manager add <FMC IP> Cisc402098527 command to add a new Cisco FTD device to the Cisco FMC; however, the device is not being added .

Why Is this occurring?
A . The NAT ID is required since the Cisco FMC is behind a NAT device.
B . The IP address used should be that of the Cisco FT
C . not the Cisco FM
E . DONOTRESOLVE must be added to the command
F . The registration key is missing from the command

Answer: A