In BGP MPLS VPNs, which router maintains VPN-specific routing tables, also known as VRFs?（）

A. set bandwidth 15
B. mpls bandwidth 15
C. set bandwidth 15000
D. mpls bandwidth 15000

A.path-option
B.route-option
C.explicit-path-option
D.explicit-route-option

A. the tunnel end point
B. the tunnel start point
C. a specific node to be traversed
D. the node prior to the tunnel end point