Final answer:
The integration of fingerprint readers in business laptops for user login is an example of Biometrics, which uses unique physical traits like fingerprints for identity verification.
Step-by-step explanation:
Fingerprint readers integrated into business laptops provide a secure and quick method for users to access their devices. The correct answer to the student's question is D. Biometrics. Biometrics refers to the measurement and statistical analysis of a person's unique physical and behavioral characteristics, especially as a means of verifying personal identity. The use of a fingerprint reader is indeed a biometric authentication method; it uses the unique patterns of a person's fingerprint to confirm their identity before granting access to the laptop.