Which two statements about the PMM-DETACHED state are true? (Choose two.)

A.
The Mobile Subscriber and SGSN contexts hold no valid location or routing information
for the Mobile Subscriber.

B.
The Mobile Subscriber location is known in the 3G SGSN with an accuracy of a serving
RNC.

C.
The serving RNC tracks the location of the Mobile Subscriber.

D.
A 3G SGSN cannot reach the Mobile Subscriber location because the location is
unknown.

E.
Signaling towards the HLR is needed if the 3G SGSN does not have an MM context for
this Mobile Subscriber.

F.
The Mobile Subscriber performs a routing area update if the routing area changes.