Question: What action does the UE take when it receives an EAP-response message associated with the HPLMN S-NSSAI or the SNPN S-NSSAI from upper layers?
Option 1: The UE sends a NETWORK SLICE-SPECIFIC AUTHENTICATION REQUEST message.
Option 2: The UE creates and sends a NETWORK SLICE-SPECIFIC AUTHENTICATION COMPLETE message with the EAP-response message in the EAP message IE.
Option 3: The UE stops timer T3575 and passes the EAP-response message to the upper layers.
Option 4: The UE provides the EAP-response message to the AAA-S via the NSSAAF.
Explanation: According to the procedure, when the UE receives an EAP-response message associated with the HPLMN S-NSSAI or the SNPN S-NSSAI from upper layers, it creates a NETWORK SLICE-SPECIFIC AUTHENTICATION COMPLETE message and sets the EAP message IE to the EAP-response message. The UE then sends this message.