Question: In a PCC architecture, when a BBERF indicates a request for Bearer Control Mode (BCM) selection at Gateway Control session establishment, what influences the PCRF's decision on the selected Bearer-Control-Mode AVP?
Option 1: Only the Network-Request-Support AVP provided by the BBERF
Option 2: Solely based on subscriber information and operator policy
Option 3: Access network information, but not the Network-Request-Support AVP
Option 4: A combination of the received Network-Request-Support AVP, access network information, subscriber information, and operator policy
Explanation: The PCRF derives the selected Bearer-Control-Mode AVP based on a comprehensive set of factors, including the Network-Request-Support AVP, access network information, subscriber information, and operator policy. This approach ensures the selected Bearer Control Mode optimally balances network efficiency, service quality, and user experience.