.Which of the following statements describes split horizon?
A. The router learns from its neighbor that a route has gone down, and the router sends an update back to the neighbor with an infinite metric to that route.
B. For a period of time, the router will ignore any route advertisements with a lower metric to a downed route.
C. A router will not send route information back out the same interface over which it was learned.
D. The moment a router determines a route has gone down, it will immediately send a route update with an infinite metric to that route.
E. The packets are flooded when a topology change occurs, causing network routers to update their topological databases and recalculate routes.