Which of the following statements about Disk Cleanup is true?

Disk Cleanup is a built-in utility in Windows operating systems designed specifically to help users reclaim storage space by removing files that are no longer required or that can safely be deleted. This includes temporary files, system cache files, and files sent to the Recycle Bin, among other unnecessary data. By selecting the appropriate options within the Disk Cleanup utility, users can efficiently clear out unneeded files, which helps to improve overall system performance and free up valuable disk space.

The other statements do not accurately describe the functionality of Disk Cleanup. For instance, defragmentation is a separate process aimed at reorganizing fragmented data on a hard drive to improve read and write efficiency. System registry optimization involves other tools or utilities specifically designed to clean and optimize the Windows registry, which is not part of Disk Cleanup's function. Updating hardware drivers is an entirely different procedure that typically requires accessing the Device Manager or manufacturer websites to obtain the latest driver versions. Thus, the focus of Disk Cleanup is solely on freeing up space by deleting unnecessary files.