Question: What is the condition for a UE to transition from EMM-DEREGISTERED to EMM-REGISTERED state?
Option 1: The UE can be in either ECM-IDLE or ECM-CONNECTED state.
Option 2: The UE must be in the ECM-CONNECTED state.
Option 3: The UE must be in the ECM-IDLE state.
Option 4: There is no specific condition for the ECM state.
Explanation: According to the text, to transition from EMM-DEREGISTERED to EMM-REGISTERED, the UE has to be in the ECM-CONNECTED state. This indicates a dependency between the EMM and ECM states in this specific scenario.