question: What happens when a registration attempt is rejected with a cause of 'permanent' PLMN restriction? [3GPP Release 18] option 1: The PLMN is added to the forbidden PLMNs list option 2: The UE enters the limited service state option 3: The UE stores the location area or tracking area in a forbidden list option 4: The UE searches for a suitable cell in the same PLMN option 5: The UE performs an investigation scan for a higher priority PLMN 