On which two database objects can the VERSIONS clause of the Flashback Versions Query be used?（） A:fixed tables B:heap tables C:external tables D:temporary tables E:Index-Organized Tables (IOTs)

On which two database objects can the VERSIONS clause of the Flashback Versions Query be used?（）
A:fixed tables
B:heap tables
C:external tables
D:temporary tables
E:Index-Organized Tables (IOTs)

出自：Oracle认证

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