Which option allows you to share a VM's resources across multiple workloads?

The choice that allows you to share a VM's resources across multiple workloads is resource oversubscription. In a virtualized environment, oversubscription refers to the allocation of more virtual resources—like CPU and memory—than are physically available on a host. This lets multiple VMs use the available resources, allowing for increased resource utilization across the workloads running on the host.

When resource oversubscription is applied, a hypervisor can manage and allocate these resources dynamically, based on demand and priority. This enables several virtual machines to operate efficiently, even if the total allocated resources exceed the physical limits. The hypervisor schedules access to the actual physical resources, ensuring that all VMs can perform tasks concurrently, thereby enhancing overall system efficiency.

This concept is particularly beneficial in scenarios where workload demands vary, enabling the effective use of underlying hardware by balancing the distribution of resources among VMs based on their current needs. By allowing more VMs to run than the physical machines can handle at their peak, organizations can efficiently maximize use of their infrastructure and lower costs.

On the other hand, resource allocation focuses on the precise allotment of available resources without emphasizing sharing beyond that. Resource contention relates to competition among VMs for limited resources, which does not inherently facilitate sharing.