Question: What is the primary purpose of the `Notify_DynamicGroup` service operation in a V2X Application Enabler (VAE) server context?
Option 1: To establish a new dynamic group for Vehicle-to-Everything (V2X) communications.
Option 2: To notify the VAE server about changes in dynamic group membership, such as joins or leaves.
Option 3: To request dynamic group information from the VAE server for a specific vehicle.
Option 4: To terminate an existing dynamic group due to inactivity.
Explanation: The `Notify_DynamicGroup` service operation is designed to update the VAE server about alterations in the composition of a dynamic group, including instances where members either join or leave the group, ensuring the server maintains an accurate view of the group's membership for effective management and coordination of V2X communications.