When preparing a returned phone, what action ensures that previous user data is not accessible?

• A. Changing the lock screen password
• B. Erasing all content and settings
• C. Reinstalling the operating system
• D. Factory resetting the battery

Answer: (B)

To ensure a returned phone doesn’t expose the previous user’s data, you need to erase all content and settings. This performs a full wipe of the device, returning it to its factory state and removing apps, accounts, personal files, and settings. That'll make the data unrecoverable to the next user. Changing the lock screen password only blocks access with a new code but doesn’t remove existing data. Reinstalling the OS might reinstall software but can leave personal data behind, and there’s no need to rely on a questionable “battery reset” option. So, erasing all content and settings is the best move because it guarantees a clean slate and protects privacy.