What does it mean if a SiteScope license is “node locked”?

A.
It is only valid for a specific SiteScope host.

B.
It is only valid for a specific remote server being monitored by SiteScope.

C.
It is only valid for a specific SiteScope host that is integrated with BSM.

D.
It is only valid for a speci fic SiteScope host that is integrated with OM.