The Cisco SDM will create a QoS policy that provides services to two types of traffic. Which two statements indicate the default QoS parameters that are created by SDM？（）

A、 Business-critical traffic will be sorted into two QoS classes.

B、 Real-time traffic will be sorted into one QoS class.

C、 Voice traffic will be considered real-time traffic while call signaling will be considered business-critical.

D、 All traffic except real-time will be considered best-effort.

E、 Routing， management， and transactional traffic will be considered business-critical.

F、 Voice and call signaling traffic will be considered real-time.