Question: In a roaming scenario with visited access, what can the Home PCRF (H-PCRF) achieve through the S9 reference point via the Visited PCRF (V-PCRF) in relation to network elements in the Visited Public Land Mobile Network (VPLMN)?
Option 1: Only receive application identifier reports from the AF in the HPLMN.
Option 2: Have dynamic PCC control over, and deliver/receive IP-CAN-specific parameters from, the PCEF and/or BBERF in the VPLMN.
Option 3: Directly manage QoS for a UE connected to a home-routed access without involving the V-PCRF.
Option 4: Solely serve Rx authorizations for an AF located in the HPLMN.
Explanation: The correct answer reflects the capability of the S9 reference point to enable the H-PCRF to exert dynamic Policy and Charging Control (PCC) over network elements in the VPLMN during a visited access roaming scenario, including exchanging IP-CAN specific parameters for managing user plane resources and ensuring seamless service delivery across networks.