Username is not a way of proving that a person who he/she claims that he/she is. Username is the identification process. Using password, authentication can be provided. Another type of authentication is showing something about one’s identity, such as a national identity card, driver’s license, and smart card. One can also authenticate using biometrics. When someone uses his/her biometrics, he/she must first identify himself/herself then submit his biometric information such as a fingerprint or an iris scan. Correct answer is B.