多项选择题

A.AB.BC.CD.DE.EF.FYou received this error message becau……

You received this error message because Oracle Net Services cannot locate the connect descriptor specified in the tnsnames.ora configuration file：
ORA_12154： TNS：could not resolve service name
Which three actions would be appropriate in helping to resolve the error？（）

A.A
B.B
C.C
D.D
E.E
F.F

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