Usersnotifyyouthattheirapplicationisfailingeverytimetheytrytoaddnewrecords.Becauseofpoorapplicationdesign，theactualORAerrormessageisunavailable.Whatmightbetheproblem？（）

A.Theapplicationuserhasexceededtheirundoquota.
B.TheFLASHBACKGUARANTEEoptionissetontheundotablespace.
C.ThetableiscurrentlybeingqueriedbyaFlashbackTransactionQueryoperation.
D.ThetableiscurrentlybeingqueriedbyaFlashbackVersionsQueryoperation.
E.TheRETENTIONGUARANTEEoptionissetontheundotablespace.

【参考答案】

A, E