What is true of MPLS TE?

What is true of MPLS TE?

A.
Only the ingress LSR must see the entire topology of the network.

B.
Every LSR needs additional information about links in the network, available resources, and constraints.

C.
Every core router must be able to create an LSP tunnel on demand.

D.
Both RSVP and CR-LDP are used in conjunction to establish traffic engineering (TE) tunnels and to propagate the labels.