Final answer:
James can delete all copies of a backed-up file or folder from his Time Machine backup disk by using the "Delete" button in the Time Machine interface, manually deleting it from the backup disk, or using the Terminal command for deletion.
Step-by-step explanation:
To delete all copies of a backed-up file or folder from the Time Machine backup disk, James can do either of the following:
- Use the "Delete" button in the Time Machine interface.
- Manually delete it from the backup disk.
- Use the Terminal command for deletion.
Option C, Time Machine doesn't allow deleting individual files, is not accurate as both option A and option B allow for deleting files from the Time Machine backup disk.
It is important to note that when deleting files from the Time Machine backup disk, caution should be exercised as it can result in permanent loss of those files.