In Huawei Cloud Stack, when the tenant VM status is abnormal or the VM status is inconsistent with the power status, which of the following is not the cause of the failure?

In Huawei Cloud Stack, when the tenant VM status is abnormal or the VM status is inconsistent with the power status, which of the following is not the cause of the failure?
A . System internal abnormality or network abnormality occurs during the operation of the virtual machine
B . The types of operations performed on virtual machines are only supported by some operating systems
C . Perform two or more operations on a virtual machine at the same time, such as mounting a volume, unmounting a volume, mounting a network card, etc.
D . The relevant files of the virtual machine on the host where the virtual machine is located are lost

Answer: D