In order for Sara, a client, to logon to her desktop computer, she must provide her username, password, and a
four-digit PIN.
Which of the following authentication methods is Sara using?

A.
Three factor

B.
Single factor

C.
Two factor

D.
Four factor

Explanation:
Single-factor authentication is when only one authentication factor is used. In this case, Something you know is
being used as an authentication factor. Username, password, and PIN form part of Something you know.