In Huawei FusionCompute, a virtual machine running Linux is created.

In FusionCompute architecture, thehost OSrefers to the operating system running on thephysical compute node.

TheCompute Node Agent (CNA)is the component deployed on the physical server. It integrates the host operating system and hypervisor, directly managing hardware resources and providing virtualization services.

Linux VM (A)refers to the guest OS running inside a virtual machine.

VRM (B)is the centralized management component.

VNA (C)is responsible for virtual networking services.

Therefore, the host OS runs within theCNA, makingDthe correct answer.