Question: What is the primary purpose of the `Reserve_NetworkResource` service operation in the context of V2X (Vehicle-to-Everything) communications within a 3GPP network?
Option 1: To establish a direct communication link between User Equipment (UE) for proximity services.
Option 2: To manage Quality of Service (QoS) parameters for ongoing V2X sessions.
Option 3: To authenticate V2X applications before service provisioning.
Option 4: To allocate and manage network resources based on V2X application requirements.
Explanation: The `Reserve_NetworkResource` service operation provides V2X applications with necessary network resources by reserving them in advance, ensuring critical V2X communications have sufficient network capacity for reliable and efficient V2X service delivery.