Which global configuration parameter will accomplish this?

You manage an MPLS network where the PE devices consist of multiple vendors. You are
asked to conceal the MPLS topology for all LSPs. Which global configuration parameter will
accomplish this?

A.
Configure no-propagate-ttl on all routers within the MPLS network.

B.
Configure no-decrement-ttl on the ingress router only.

C.
Configure no-propagate-ttl on the ingress router only.

D.
Configure no-decrement-ttl on all routers within the MPLS network.