What are two elements that must be configured to enable LDP?

What are two elements that must be configured to enable LDP? (Choose two.)

A.
Add the family mpls statement to the relevant interfaces under the [edit interfaces]

B.
Add the relevant interfaces under the [edit protocols ldp] hierarchy.

C.
Add the relevant interfaces under the [edit protocols rsvp] hierarchy.

D.
Add the family iso statement to the relevant interfaces under the [edit interfaces]
hierarchy.