Which statement is correct in adding the FTP.Login.Failed signature to the IPS sensor profile?

Refer to the exhibit.

Review the Intrusion Prevention System (IPS) profile signature settings.

Which statement is correct in adding the FTP.Login.Failed signature to the IPS sensor profile?
A . The signature setting uses a custom rating threshold.
B . The signature setting includes a group of other signatures.
C . Traffic matching the signature will be allowed and logged.
D . Traffic matching the signature will be silently dropped and logged.

Answer: D

Explanation:

Action is drop, signature default action is listed only in the signature, it would only match if action was set to default.