InyourCiscoEIGRPnetwork，younoticethattheneighborrelationshipbetweentwoofyourrouterswasrecentlyrestarted.Whichtwoofthesechoicescouldhavemadethisoccur？（）

A.Anupdatepacketwithinitflagsetfromaknown，alreadyestablishedneighborrelationshipwasreceivedbyoneoftherouters.
B.TheARPcachewascleared.
C.Thecounterswerecleared.
D.TheIPEIGRPneighborrelationshipwasclearedmanually.

【参考答案】

A, D