Question: What does the presence of the SOR Transparent Container IE in a message from the User Equipment (UE) indicate?
Option 1: The UE is requesting a new SOR transparent container.
Option 2: The UE has successfully received the SOR transparent container IE in the REGISTRATION ACCEPT message and acknowledges it.
Option 3: The UE does not support SOR-CMCI.
Option 4: The UE is rejecting the previously sent SOR transparent container.
Explanation: The presence of the SOR Transparent Container IE in a message from the User Equipment (UE) indicates that the UE has successfully received the SOR transparent container IE in the REGISTRATION ACCEPT message and acknowledges it, showing its support for SOR-CMCI.