Complete copies of a computer system's data.

• A. System backups
• B. Stored locally
• C. Stored remotely
• D. Backups by file

Answer: (A)

System backups are complete copies of a computer system's data, capturing the operating system, installed applications, settings, and all files so you can restore the entire system to a previous state. This full image is what enables a bare-metal recovery after a failure or disaster. Storing backups locally or remotely describes where the backup is kept, not its scope, while backups by file refer to saving individual files rather than the entire system. So the concept that best matches “complete copies of a computer system's data” is system backups.