An RSVP enabled router receives an RSVP reservation message for a new RSVP path. The router is unable to accommodate the reservation request.
Which action does the router take?
A. The router sends a ResvErr message to the upstream router.
B. The router sends a ResvErr message to the downstream router.
C. The router sends a ResvTear message to the upstream router.
D. The router sends a ResvTear message to the downstream router.
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