Which of the following archiving methods only backs up data that has changed since the previous full backup?

A snapshot captures the state of a system or data at a particular point in time, including all data blocks, rather than just changes since a full backup.

An incremental backup archives data that has changed since the last backup of any type (full, incremental, or differential), requiring all previous backups for a full restore.

A copy backup creates a complete copy of all selected files and folders but does not clear the archive bit, so it does not affect subsequent full or incremental backups.

A differential backup saves all files that have changed since the last full backup. Each differential backup is cumulative, meaning it always references the most recent full backup. To restore, you only need the last full backup and the latest differential backup.