Question: What happens to the slice deregistration inactivity timer when a PDU session associated with the S-NSSAI is successfully established over the corresponding access type(s)?
Option 1: The timer value is updated.
Option 2: The timer is paused.
Option 3: The timer continues running without any change.
Option 4: The timer is stopped and reset.
Explanation: According to the text, when at least a PDU session associated with the S-NSSAI is successfully established over the corresponding access type(s), the slice deregistration inactivity timer is stopped and reset. This ensures that the timer does not expire prematurely, allowing the UE to continue using the network slice.