The correct option is C. Saving documents without a password. Explanation of Why Option C is Correct When we talk about securing files, we are referring to methods that protect the confidentiality, integrity, and availability of those files. Let's break down why saving documents without a password is not a suitable method for securing files:

1. Lack of Access Control: When you save a document without a password, anyone who has access to the storage location (like a computer, USB drive, or cloud storage) can open and view the document. This means that sensitive information can be easily accessed by unauthorized users, leading to potential data breaches.
2. No Encryption: Password protection often goes hand-in-hand with encryption. When a file is password-protected, it is typically encrypted, meaning that even if someone gains access to the file, they cannot read it without the password. Without a password, the file remains in plain text, making it vulnerable to anyone who can access it.
3. Inadequate Protection Against Theft: If a device is lost or stolen, files that are not password-protected can be accessed by anyone who finds the device. This is particularly concerning for personal or sensitive information, such as financial records or personal identification.

Why the Other Options Are Weaker or Incorrect Now, let’s analyze the other options to understand why they are suitable methods for securing files: A. Use of backup - Explanation: Backing up files is a critical part of data security. It ensures that even if the original files are lost, corrupted, or compromised, you have copies stored safely elsewhere. Backups can be stored on external drives, cloud services, or other secure locations. This method protects against data loss due to hardware failure, accidental deletion, or ransomware attacks. - Conclusion: This method is suitable for securing files as it ensures data availability and integrity. B. Use of antivirus - Explanation: Antivirus software protects files from malware, viruses, and other malicious threats that can compromise data integrity and confidentiality. By scanning files and preventing harmful software from executing, antivirus programs help maintain the security of files stored on a device. - Conclusion: This method is suitable for securing files as it protects against external threats. D. Proper labelling of storage devices - Explanation: Proper labeling of storage devices helps in organizing and identifying files and their contents. While it does not directly secure files, it aids in managing data effectively and can prevent accidental deletion or misplacement of important files. It also helps in ensuring that sensitive data is handled appropriately. - Conclusion: This method is suitable for securing files in terms of organization and management, although it does not provide direct security measures like encryption or access control. Summary of Key Points

• Option C (Saving documents without a password) is not suitable for securing files because it lacks access control and encryption, making files vulnerable to unauthorized access.
• Option A (Use of backup) is essential for data recovery and integrity.
• Option B (Use of antivirus) protects files from malware and external threats.
• Option D (Proper labelling of storage devices) aids in organization and management of files, contributing to overall data security.

Revision Summary

• Always use passwords to protect sensitive documents to ensure confidentiality.
• Regularly back up files to prevent data loss.
• Utilize antivirus software to protect against malware threats.
• Organize and label storage devices to manage files effectively.