To change file permissions on a file created by another user, what should you request?

To change file permissions on a file created by another user, the appropriate action is to request Modify permission from that user. Modify permission allows the requester to edit the content of the file as well as change its attributes, including file permissions themselves. This ensures that you can perform necessary actions such as adding or removing content from the file without needing the user to delete it or transfer ownership.

Modify permission strikes a balance between giving you enough rights to work with the file while still maintaining the original ownership and intent of the creator. It respects the file's original permissions structure, keeping the security model intact while allowing collaborative work to proceed efficiently.

The other options do not provide a direct or effective means to change permissions. Asking the user to delete the file does not help in modifying permissions and could lead to loss of data. Requesting Full Control would be too broad and might not be necessary for the intended changes, potentially raising security concerns. Being added to the user group might allow permissions to be inherited, but it may not be a practical solution if the user maintains a restrictive group policy for file access. Requesting Modify permission is the most straightforward and efficient approach.