Final answer:
According to the NIST Guidelines for Media Sanitation, media with a high-security categorization should be destroyed when it will be reused and is leaving the organization's control to protect sensitive information from unauthorized access.
Step-by-step explanation:
In the NIST Guidelines for Media Sanitation, if the security categorization is high and the media will be reused AND is leaving the organization's control, it should be destroyed. This ensures that all data is completely irrecoverable, thereby protecting sensitive information from potential unauthorized access or breaches. When dealing with high-security categorization, the destruction of media is typically favored over other sanitation processes like clearing or purging, especially when the media is leaving the organizational boundary, to maintain the highest level of security.