Final answer:
Windows Hello is the authentication method that uses a fingerprint scanner for biometric user authentication, providing a secure and user-friendly alternative to traditional password-based login systems.
Step-by-step explanation:
The authentication method that can use a fingerprint scanner to authenticate users is C. Windows Hello. Windows Hello is a feature integrated into Windows 10 and later operating systems that allows users to use biometric sensors, such as fingerprint scanners, facial recognition, and iris scans, to gain access to their devices, apps, and networks more securely than traditional passwords. While methods like smart cards and Microsoft Passport (now referred to as Microsoft Authenticator) also support biometric authentication, Windows Hello is specifically designed for this purpose and is directly associated with device-based biometrics.