Final answer:
In response to Anne's slow computer performance with disk errors, the appropriate command to use is CHKDSK, which scans for and fixes file system errors.
Step-by-step explanation:
If Anne is experiencing a slow computer performance and seeing disk errors in the event viewer, the correct command to resolve this issue would likely be B. CHKDSK.
CHKDSK (Check Disk) is a utility that checks the file system and file system metadata of a volume for logical and physical errors. It is capable of fixing various filesystem errors, recovering bad sectors, and ensuring that the files can be read correctly. The technician can run CHKDSK from the command prompt, and it should be executed with administrative privileges to be able to repair errors on the disk.
- DISKPART is a command-line utility for managing hard disk partitions, not for repairing them.
- FORMAT is a command used to prepare a data storage device such as a hard disk drive, solid-state drive, or USB flash drive for initial use, wiping all data in the process, which is not suitable for fixing errors without data loss.
- SFC (System File Checker) is another Windows utility that scans and repairs corrupted Windows system files, not disk errors.