A security administrator needs a method to secure data in an environment that includes some form of checks so track any changes. Which of the following should the administrator set up to achieve this goal?

File Integrity Monitoring (FIM) is the correct choice because it continuously monitors critical system and application files for unauthorized modifications. FIM tools perform checksums or cryptographic hashes of files and alert administrators to any changes, thereby providing a "check to track any changes." SPF (Sender Policy Framework) is an email authentication method, not related to data integrity. GPO (Group Policy Object) is used for managing user and computer settings in a Windows environment, not for tracking file changes. NAC (Network Access Control) manages device access to a network based on security posture, which is different from monitoring data integrity.