Which of these statements best describes VPLS?（）

A、NeitherbroadcastnormulticasttrafficiseverfloodedinVPL
B、MulticasttrafficisfloodedbutbroadcasttrafficisnotfloodedinVPL
C、VPLSemulatesanEthernetswitch,witheachEMSbeinganalogoustoaVLA
D、BecauseU-PEdevicesactasIEEE802.1devices,theVPLScoremustuseST
E、Whentheproviderexperiencesanoutage,IPre-routingrestoresPWconnectivityandMACrelearningisneeded.