What action should an operator take to deploy three unique VM instances from a template?

Using a Windows 10 customization specification during the deployment of virtual machines from a template is a best practice in this scenario. When deploying multiple virtual machines from the same template, the customization specification enables the operator to automatically configure each VM's unique settings, such as the computer name, IP address, and other OS-related settings. This ensures that each instance operates independently and avoids conflicts that could arise when multiple machines share the same configuration, particularly in network scenarios.

The customization specification process is designed to simplify the deployment of multiple VMs by automating these configurations. It allows the operator to generate unique instances without manually reconfiguring each VM after creation, which is efficient and reduces the potential for human error.

In contrast, the other options focus on manual processes or less efficient methods of creating unique VM instances. For instance, while exporting and manually changing computer names is a potential approach, it is time-consuming and cumbersome, especially when managing multiple VMs. Cloning the template could create identical instances unless a post-cloning configuration is conducted, which still requires manual input or additional steps, therefore being less efficient than utilizing the built-in customization capabilities.