WhichthreecharacteristicsofthetrafficflowaretakenintoconsiderationwhentheQoS－for－VPNsfeature(QoSpre－classify)providespacketclassificationandappliesappropriateQoSserviceontunnelinterfaces?()

A.IPprecedencebits

B.DSCPbits

C.originalportnumbers

D.DEbits

E.sourceIPaddress

F.destinationIPaddress