Backups are the best control to mitigate the impact of a failed IT system upgrade project that has resulted in the corruption of an organization's asset inventory database, as they allow theorganization to restore the data from a previous state and resume normal operations. Encryption, authentication, and configuration are not the best controls, as they do not address the data corruption issue, but rather the datasecurity, access, and quality issues, respectively. References = CRISC Review Manual, 7th Edition, page 153.