Which statement about backups is most accurate for restoring data quickly?

• A. Full backups copy all data
• B. Incremental backups copy all data
• C. Full backups copy only changes since the last backup
• D. Incremental backups copy only changed data since the last backup

Answer: (A)

The main idea here is that restoring quickly benefits from having a single, complete copy of all data. A full backup saves every file and data item in one archive, so you can restore the system in one step without pulling data from multiple sources. Incremental backups only store what changed since the last backup, so restoring requires first loading the latest full backup and then applying every subsequent incremental backup in order, which takes longer. The option that describes a full backup copying only changes is incorrect, and the option that describes incremental backups copying all data is also incorrect. Therefore, a full backup is the description most aligned with a fast restore.