A.Theinterfaceactivelyattemptstoconvertthelinktoatrunklink.
B.TheinterfaceisputintopermanenttrunkingmodebutpreventedfromgeneratingDTPframes.
C.Theinterfaceisputintopermanenttrunkingmodeandnegotiatestoconvertthelinkintoatrunklink.
D.Theinterfaceisputintoapassivemode，waitingtoconvertthelinktoatrunklink.
E.Noneoftheotheralternativesapply
正确答案：参考A
