How does the use of the 'Get-ADComputer' cmdlet relate to modifying Active Directory settings?

The 'Get-ADComputer' cmdlet is primarily used to retrieve information about computer objects in Active Directory (AD). When you utilize this cmdlet, you're effectively querying AD to check for the existence of a specific computer object, along with its associated properties and attributes. This functionality is crucial for managing and auditing the state of computers within the Active Directory environment.

By confirming the existence of a computer object, administrators can ensure that the system they are managing is indeed represented in AD, which is essential for various administrative tasks such as group policies, security assessments, and inventory management. The other options relate to actions that either modify, create, or delete objects, which are not functionalities offered by 'Get-ADComputer'; it is strictly focused on data retrieval. Thus, option C is accurate as it highlights the primary use of the cmdlet in verifying the existence of computer objects within Active Directory.