Which MQC-based output queueing method is designed to support multiple traffic classes including VoIPtraffic， mission-critical traffic， bulk traffic， interactive traffic and default class traffic？（）

A.IP protocol 50
B.IP protocol 51
C.TCP port 50
D.TCP port 51
E.UDP port 50
F.UDP port 51

A.terminating PPP sessions at the service provider
B.PPP framing
C.PPP multiplexing
D.GRE tunneling
E.L2TP tunneling

A.multicast temporary node local
B.multicast temporary site local
C.unicast permanent link local
D.multicast permanent node link local
E.multicast permanent site local
F.unicast temporary link local