In MPLS traffic engineering， which one of the following protocols is used for Path Setup？（）

A.Frame Relay Top Pseudowire
B.Frame Relay Traffic Pseudowire
C.Frame Relay Traffic Protocol
D.Frame Relay Traffic Policing

A.True
B.False

A.It is a label distribution protocol for MPLS
B.It is a set of procedures and messages by which LSRs establish Label Switch Paths （LSPs） through a network
C.Tag distribution Protocol （TDP） was the basis for LDP
D.All of the above are true