After transmitting a 'code 4' or 'no further assistance required' message, what is the proper next step?

After transmitting a 'code 4' or 'no further assistance required' message, what is the proper next step?

• A. Continue transmitting high-priority updates on the same channel.
• B. Record the time and wait for a supervisor to respond.
• C. Log the call and immediately switch to another channel.
• D. Confirm with dispatch, then cease transmissions on that channel until needed again.

Answer: (D)