Which statement about the function of poison reverse in EIGRP is true?

Which statement about the function of poison reverse in EIGRP is true?

A.
It tells peers to remove paths that previously might have pointed to this router.

B.
It tells peers to remove paths to save memory and bandwidth.

C.
It provides reverse path information for multicast routing.

D.
It tells peers that a prefix is no longer reachable.