WhichisnotareasonthatInternetServiceProvidersprefertousePPPoverEthernet(PPoE)?()
A. accesscontrolandbillingcanbedoneonaper-user,ratherthanaper-sitebasis
B. supportsLinkFragmentationandInterleaving
C. providestheabilitytoconnectanetworkofhostsoverasimplebridgingaccessdevice
D. providesaconsistentmeansofauthenticatingusers(RADIUSforexample)