What happens when the UPDATERRTDWARNING threshold is breached?

A.
An EMS event is generated on the RDF backup system.

B.
An EMS event will be generated only if an RDFCOM STATUS RTDWARNING command is
executed.

C.
An EMS event will be generated only if an RDFCOM STATUS RTDWARNING or an RDFCOM
STATUS RDF command is executed.

D.
An EMS event is generated on the RDF primary system.