Question: What type of information can be included in the error details passed from the Short Message Relay (SMR) entity to the Short Message Transfer Layer (SM-TL) via SM-RL-REPORT-INDication, besides a cause?
Option 1: Only the RP-ACK acknowledgement
Option 2: Extended diagnostic information (optionally)
Option 3: The entire RP-ERROR message content
Option 4: Details of the originating UE: User Equipment
Explanation: When the SMR entity uses SM-RL-REPORT-INDication to pass error information to SM-TL, this error information consists of an appropriate cause and, optionally, extended diagnostic information, providing additional context if needed beyond just stating the cause.