What is the purpose of the int-num variable in the Cisco IOS interface configuration command mpls l2transport route when you configure a Cisco 7600 Series router to do Ethernet over MPLS?

A.
It specifies the interface address of the remote router.

B.
It specifies the incoming interface of the Layer 2 traffic to be transported over the MPLS backbone.

C.
It specifies the outgoing interface through which to route the EoMPLS traffic.

D.
It specifies the desired VLAN interface number.