Operating Systems·Protection & Security·FoundationDeleting a file does not delete the dataA sensitive file is deleted with rm. The data can often still be recovered from the disk.Why?AThe file is quietly moved into some hidden recovery area by the file system itself, ready to be restoredBThe operation removes the directory entry and frees the blocks, without altering their contentsCThe data is retained in memory and written back laterDThe file system keeps a backup copy of every deleted fileCheck answer