Which statement about intrusion detection in the PIX Firewall is true?

Which statement about intrusion detection in the PIX Firewall is true?

A.
The PIX Firewall supports the Cisco IDSPostOffice protocol that is used by the Cisco IDS
appliances and the Catalyst 6000 IDSM.

B.
The PIX Firewall supports a subset of the intrusion detection signatures supported by the Cisco
IDS product family.

C.
The PIX Firewall recognizes the same signatures supported by the Cisco IDS product family.

D.
The PIX Firewall can detect three different types of signatures: informational signatures, alarm
signatures, and attack signatures.