In Huawei Cloud Stack, which of the following descriptions about the Cloud Firewall CFW service is wrong?

In Huawei Cloud Stack, which of the following descriptions about the Cloud Firewall CFW service is wrong?
A . Supports definition of protection objects based on business tags
B . The expansion policy automatically inherits the access policy configured for the first time according to the business access relationship
C . Supports visual traffic topology diagrams, which can assist customers in completing semi-automatic configuration of security rules
D . If two cloud servers are in the same subnet, access isolation through this service is not supported

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Answer: D