Question: In a Notify Update Session scenario for VAE Services, what action attribute value does the VAE Server include when invoking a procedure to indicate the result of a session update requested by itself?
Option 1: CREATE - Indicating a new session creation
Option 2: DELETE - Signifying session termination
Option 3: UPDATE - Reflecting changes to an existing session
Option 4: READ - Denoting a request for session information retrieval
Explanation: The correct answer is 'UPDATE' because, in Notify Update Session scenarios, the VAE Server responds with an 'UPDATE' action attribute when conveying changes to an existing session, aligning with the context of updating rather than creating, deleting, or merely reading session information.