Explanation The method that requires the MOST time to restore data for an application is a Full Backup. Full backups contain all the data that is required to restore an application, but the process of restoring the data is the most time-consuming as it involves copying all the data from the backup to the application. Incremental backups only backup the changes made since the last backup, differential backups only backup changes made since the last full backup, and disk mirroring provides real-time data replication, so the data is immediately available.