When verifying Cisco IOS IPS operations, when should you expect Cisco IOS IPS to start loading the signatures?

A.
immediately after you configure the ip ips sdf location flash:filename command

B.
immediately after you configure the ip ips sdf builtin command

C.
after you configure a Cisco IOS IPS rule in the global configuration

D.
after traffic reaches the interface with Cisco IOS IPS enabled

E.
when the first Cisco IOS IPS rule is enabled on an interface

F.
when the SMEs are put into active state using the ip ips name rule-name command