Which three configuration elements are minimally required in the baseline?

Before configuring an RSVP LSP in your network, you first apply a baseline configuration to all of
the routers. Which three configuration elements are minimally required in the baseline? (Choose
three.)

A.
family mpls on the loopback interface

B.
family mpls on the transit interfaces

C.
protocols ldp for the appropriate interfaces

D.
protocols mpls for the appropriate interfaces

E.
protocols rsvp for the appropriate interfaces

Explanation: