What tool would you use to enable auditing on systems in your network?

The Group Policy Editor is the appropriate tool for enabling auditing on systems in your network because it provides centralized management for security settings, including audit policies. By using the Group Policy Editor, administrators can define and manage a variety of audit policies for user activities, logon events, and access to resources across multiple machines in an Active Directory environment. This tool allows for consistent security configurations across all systems that are part of the domain, ensuring that auditing is properly set up and maintained.

Other options, while useful for different purposes, do not provide the same level of control or scalability. Task Scheduler is primarily for setting and automating tasks on local systems; Registry Editor allows users to make changes to the system registry, which is not the primary method for configuring audit settings; and Command Prompt can run specific commands but does not provide an integrated interface for managing multiple audit policies across the network. Therefore, the Group Policy Editor is the most effective choice for establishing and managing auditing policies.