Refer to the Exhibit. The Prod-DB virtual machine has a VM Override as shown in the Exhibit. What step, it taken, would require all virtual machines in the cluster to migrate automatically?

Deselecting a single VM from VM Overrides only removes the per-VM override for that one VM, causing it to follow cluster settings, but has no effect on other VMs that have their own separate overrides configured.

Adding all VMs to VM Overrides is a multi-step action that would require individually configuring each VM's override to Fully Automated, which is neither a single step nor what the exhibit scenario describes as the required action.

The 'Response for Host Isolation' setting controls how a VM behaves when its ESXi host loses management network connectivity, which is a vSphere HA setting unrelated to DRS automation level or automatic migration behavior.

When a VM Override's automation level is changed to 'Use Cluster Settings', the VM stops using its individual override and instead inherits whatever automation level is configured for the cluster. If the cluster DRS automation level is Fully Automated, the VM will then be subject to automatic vMotion migrations alongside all other VMs, satisfying the requirement for cluster-wide automatic migration.