Which two statements about the QoS policy generation phase of the Cisco SDM QoS wizard are true？（）
- Athe SDM QoS wizard will create two real-time traffic classes to handle VoIP， voice signaling， and video packets
- Bthe SDM QoS wizard will create three real-time traffic classes to handle VoIP， voice signaling， video， and video packets
- Cthe SDM QoS wizard will create four real-time traffic classes to handle VoIP， voice signaling， video， and video streaming packets
- Dthe SDM QoS wizard will create two business-critical traffic classes to handle transactional and network management packets
- Ethe SDM QoS wizard will create three business-critical traffic classes to handle transactional， network management， and routing packets
- Fthe SDM QoS wizard will create four business-critical traffic classes to handle transactional， network management， routing， and best-effort packet