What should an administrator assign to a guest that requires a single CPU?

To provide the guest with the necessary resources for its operation, it is essential to assign 1 virtual CPU to the guest. Virtual CPUs (vCPUs) are allocated within a virtualized environment and allow multiple virtual machines to efficiently share the underlying physical hardware. By assigning 1 virtual CPU to the guest, the administrator ensures that the guest operating system and applications running within that environment can utilize the processing power they require without the need for a full physical CPU allocation. This approach promotes better resource management, system efficiency, and scalability within a cloud or virtualized infrastructure, allowing for optimal performance in light of the specific workload demands of the guest.

The other options involve assigning resources to the host or allocating physical CPUs, which would not meet the requirement as effectively for the guest needing a single CPU. Assigning resources this way would not utilize the benefits of virtualization correctly, where the aim is to maximize resource usage and flexibility.