Which of the following descriptions of Huawei Cloud Stack as a commercial solution is incorrect?

Which of the following descriptions of Huawei Cloud Stack as a commercial solution is incorrect?
A . Reliability, including overall reliability, data reliability and single device reliability
B . Security, follow industry security regulations, design security protection, and ensure the safety of customer data centers
C . Scalability. The resources supporting the data center need to be elastically scalable according to business application workload requirements. The IT infrastructure should be loosely coupled with the business system.
D . Advanced, the open source OpenStack release version is synchronized twice a year to ensure that the latest open source OpenStack features are synchronized to the customer’s existing network environment

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Answer: D