Which utility would Ryder use to check for bad sectors and lost clusters on a FAT file system in Windows?

The correct choice is based on the utility's functionality specific to file system integrity checks. Chkdsk.exe (Check Disk) is the Windows utility specifically designed to check for and repair file system errors, including bad sectors and lost clusters on a FAT file system. It scans the disk for issues related to data integrity and can fix problems that might prevent the system from accessing files correctly.

When Chkdsk is run, it assesses the structure of the file system and checks each sector of the disk to ensure that data is stored correctly. If it encounters bad sectors, it attempts to mark them as unusable to prevent data from being written to those areas again.

In contrast, Scandisk.exe, while also used for checking disk errors, has been largely replaced by Chkdsk in later versions of Windows. Defrag.exe is related to disk defragmentation, which is about optimizing file storage rather than checking for bad sectors or data integrity. Diskpart.exe is a command-line utility used for partition management and does not perform checks or repairs on the file system itself.

Thus, when it comes to checking for bad sectors and lost clusters in a FAT file system, Chkdsk.exe is the appropriate and effective tool to use.