Which statements are true about Huawei OceanStor V3 WORM feature? (Multiple Choice)

Which statements are true about Huawei OceanStor V3 WORM feature? (Multiple Choice)
A . When a file is in the locked state, the file protection duration can be manually prolonged or shortened.
B . A locked file will shift to the expired state if the file system WORM clock value is greater than the file atime value.
C . After the WORM file system compliance clock has exceeded the file expiration time, an appending file will shift from the appending state to the expired state.
D . Only files of 0 byte can shift from the locked state to the appending state.

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Answer: B,C,D