How would you best describe route poisoning in a Distance Vector routing protocol?

A.
Upon detecting a network failure, a router sourcing the network update will set the hop
value in the update to infinity and send a triggered update to its neighbors

B.
Upon detecting a network failure, a router receiving an update about that neighbor will
drop the update

C.
Upon detecting a network failure, a router receiving an update about that neighbor will
not flood it back to the source router that sent it the update

D.
Upon detecting a network failure a router sourcing the network update will set the hop
value in the update to 0 and send a triggered update to its neighbors