Final answer:
According to the NIST Guidelines for Media Sanitation, if the security categorization is moderate and the media will be reused without leaving organizational control, it should be cleared or purged to prevent data recovery by standard methods.
Step-by-step explanation:
In the NIST Guidelines for Media Sanitation, if the security categorization is moderate and the media will be reused AND is not leaving the organization's control, it should be cleared or purged. When media is categorized at a moderate level, the information contained is sensitive enough that simple deletion is not sufficient. The goal of clearing or purging is to protect the data from being recovered by standard file recovery methods. Clearing usually involves overwriting the storage space with new data, while purging might involve degaussing or physically destroying the media if it will not be reused. It's important to follow the guidelines to ensure proper data security practices are upheld within the organization.