There is MPLS VPN traffic traversing through a TE intermediate router. What is the MPLS packet labelstack sequence （from outer to inner） for the VPN traffic on this router？（）

A.Express mode
B.Strict mode
C.Loose mode
D.Tunnel mode
E.Safe mode

A.Multicasting
B.Global addressing
C.Forward-explicit congestion notification （FECN）
D.Virtual circuit status messages.
E.Backward-explicit congestion notification （BECN）

A.Loss should be no more than 1 percent.
B.One-way latency should be no more than 150 ms
C.Jitter should be no more than 30 ms
D.Loss should be no more than 3 percent
E.One-way latency should be no more than 150/2=75 ms
F.Jitter should be no more than 300 ms