Anadministratorrunsmktcpipaixhost172.168.0.50enOtochangethenetworkaddress,butthecommandhangsforanextendedperiodoftime.Whichofthefollowingisthemostlikelycauseoftheproblem()

A.entOisinadefinedstate

B.enOiscurrentlyactive

C.Thereisnophysicalnetworkadapteronthesystem

D.Theaddress172.168.0.50isinusebyanothersystem