A network administrator is implementing an active/passive high availability Cisco FTD pair.
When adding the high availability pair, the administrator cannot select the secondary peer.
What is the cause?
A. The second Cisco FTD is not the same model as the primary Cisco FTD.
B. An high availability license must be added to the Cisco FMC before adding the high availability pair.
C. The failover link must be defined on each Cisco FTD before adding the high availability pair.
D. Both Cisco FTD devices are not at the same software Version
