When an enterprise engineer was performing routine maintenance on Huawei Cloud Stack, he found that all the requests for the deployed key management service were responded to, but some of the responses were failure information. Which of the following descriptions of the possible causes of this phenomenon is wrong?

When an enterprise engineer was performing routine maintenance on Huawei Cloud Stack, he found that all the requests for the deployed key management service were responded to, but some of the responses were failure information. Which of the following descriptions of the possible causes of this phenomenon is wrong?
A . Network failure between the key management service and the database
B . The KMS process of scc-Serice is abnormal
C . A single HSM fails and cannot provide external services
D . The network between the key management service and the HSM is disconnected

Answer: B