Question: What is the primary purpose of the `ResetTimerGPRS` procedure initiated by the `gsmSCF` in a CAMEL environment?
Option 1: To synchronize timers across all nodes in the GPRS network
Option 2: To extend the session duration for a specific UE (User Equipment)
Option 3: To trigger a location update for a subscriber
Option 4: To prevent the Tssf application timer from timing out at the gprsSSF
Explanation: The `gsmSCF` uses `ResetTimerGPRS` to refresh the Tssf application timer, preventing it from timing out at the gprsSSF, thus maintaining active sessions without interruption due to timer expiration.