Final answer:
The correct answer is D) Distributed Resource Scheduler.
Step-by-step explanation:
The correct answer to the question is D) Distributed Resource Scheduler.
Virtual Machine-Host affinity rules are implemented using the Distributed Resource Scheduler (DRS) feature. DRS is a VMware vSphere feature that automatically balances and optimizes resources of virtual machines across hosts within a DRS cluster.
DRS uses a set of algorithms to monitor the resource utilization of hosts and virtual machines, and makes recommendations for vMotion migrations to balance the workload. VM-Host affinity rules can be set within the DRS cluster settings to control the placement of virtual machines on hosts based on their affinity or anti-affinity requirements.