What are the steps for configuring stateful NBAR for dynamic protocols？（）

• A、Use the command ip nbar protocol-discovery to allow identification of stateful protocols. Use the command ip nbar port-map to attach the protocols to an interface.
• B、Use the command match protocol rtp to allow identification of real-time audio and video traffic. Use thecommand ip nbar port-map to extend the NBAR functionality for well-known protocols to new port numbers.
• C、Use the command match protocol to allow identification of stateful protocols. Use the command ip nbar port-map to attach the protocols to an interface.
• D、Configure a traffic class. Configure a traffic policy. Attach the traffic policy to an interface.
• E、Configure video streaming. Configure audio streaming. Attach the codec to an interface.