Where does the LAC obtain the L2TP tunnel’s attributes？（）

A.A single Control Connection and a single Session
B.A single Control Connection and multiple Sessions(one pers ubscriber)
C.Multiple Control Connections and a single Session
D.Multiple Control Connections and multiple Sessions(one per subscriber)

A.It must be the same as the server-name parameter on the LAC
B.It must be the same as the client-name arameteron the LAC
C.It must be the same as the remote-hostname parameter on the LAC
D.It must be the same as the tunnel password parameter on the LAC

A.It allows L2F tunnels across the network.
B.It allows GRE tunnels across the network.
C.It allows PPTP tunnels across the network.
D.It allows PPP to be tunneled across a network