In which three ways do PE routers manage multiple customers in MPLS VRF environments? (Choose three.)
A. Route targets are configured that allow the PE to uniquely identify the customer routes in MPBGP
B. PE routers use route distinguishers to tag routes for importing and exporting into customer VRFs.
C. PE routers use PE-CE routing protocols to manage routing with client VRF devices.
D. PE routers use route targets to tag routes for importing and exporting into customer VRFs.
E. Route distinguishes are configured that allow the PE to uniquely identify the customer routes in MP-BGP.
F. PE routers use PE-PE routing protocols to manage routing with client VRF devices.
