Which of the Following Statements About Data Protection Functions Provided

Which of the following statements about data protection functions provided by Huawei OceanStor 9000 is false?

A) Huawei OceanStor 9000 uses the erasure code technique to provide N+M redundant storage of data.
B) Huawei OceanStor 9000 uses the mirroring technique to provide redundant storage of metadata.
C) If physical domains are used, the failure of a disk or node in one domain will deteriorate the data reliability of other domains or even cause data loss.
D) If the protection level is N+1, a cluster requires a minimum of three nodes.