Question: Under which condition does a Combined Routing Area (RA) / Location Area (LA) Update Procedure occur for a UE in Network Operation Mode I, related to changes in the UE's configuration or state?
Option 1: When a GPRS-attached MS performs a periodic Routing Area Update without any changes in its access capabilities or DRX parameters.
Option 2: When a UE, supporting CS fallback, undergoes a change in its voice domain preference for E-UTRAN.
Option 3: During an ongoing CS (Circuit Switched) connection, when the MS enters a new RA.
Option 4: When a suspended MS is not resumed by the BSS, prompting a need to update both RA and LA upon reactivation.
Explanation: A Combined RA/LA Update Procedure is triggered by specific changes or events necessitating updates to both Routing Area (for packet services) and Location Area (for circuit-switched services). The scenario where a suspended MS isn't resumed by the BSS implies a need for the UE to re-establish its service context, including updating both RA and LA for seamless service continuity.