Which description is true about how remote IP Fast Reroute addresses failures in the ring topologies?

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Which description is true about how remote IP Fast Reroute addresses failures in the ring topologies?

A. Routers establish a targeted LDP session with the furthest router that that is in a PQ space. It requires an equal cost path to both edge ring routers.
B. Routers establish an MPLS TE tunnel with both edge ring routers.
C. Routers establish a GRE tunnel with the furthest PQ node in the ring.
D. Routers establish a GRE tunnel with the closest PQ node in the ring.
E. Routers establish a targeted LDP session with the closest router that is in a PQ space.
F. Routers establish an MPLS TE tunnel with all PQ nodes in the ring.