You are running Cisco lOS IPS software on your edge router. A new threat has become an issue.
The Cisco lOS IPS software has a signature that can address the new threat, but you previously retired the signature. You decide to unretire that signature to regain the desired protection level.
How should you act on your decision?

A.
Retired signatures are not present in the routers memory. You will need to download a new signature package to regain the retired signature.

B.
You should re-enable the signature and start inspecting traffic for signs of the new threat.

C.
Unretiring a signature will cause the router to recompile the signature database, which can temporarily affect performance.

D.
You cannotunretire a signature. To avoid a disruption in traffic flow, it’s best to create a custom signature until you can download a new signature package and reload the router.