Which of the following statement about computing resources on-line adjustment in Huawei computing virtualization is wrong? (Multiple choice)

Which of the following statement about computing resources on-line adjustment in Huawei computing virtualization is wrong? (Multiple choice)
A . vCPU, vRAM online add function is not supported by all OS
B . for not support hot add OS, FusionCompute supporting restart of virtual machines take effect
C . FusionCompute provide CPU, memory heat delete function.
D . All OS support vCPU, vRAM online add function

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Answer: CD