Which statement about failover is true?

Which statement about failover is true?

A.
Configuration replication is automatic from the active PIX Firewall to the standby PIX Firewall.

B.
When configuring the PIX Firewall for failover, you must configure the primary and secondary
PIX Firewalls exactly the same.

C.
The active PIX Firewall replicates only the failover configuration to the standby PIX Firewall.

D.
Configuration can be modified on either the primary or secondary PIX Firewalls with the same
results.