What is the purpose for this command?

While reviewing the config file you see the command "Set attack-db mode check". What is the purpose for this command?

A.
To insure all traffic is checked regardless of policy

B.
To Enable Deep Inspection functionality in theNetscreenfirewall

C.
To make sure that only traffic checked by a policy will be evaluated by the Deep Inspection

D.
To insure you will be notified by a message when the Attack database needs to be updated

Explanation:

This command will insure you will be notified by a message when the Attack database needs to be updated.