You are considering adding layers to your authentication system currently in place. Reading through some of the vendor literature on logon solutions, it frequently mentions two and three factor authentication. Your assistant asks you what the difference between the two is. Select the options that correctly describe two-factor and three-factor authentication:

A.
Two-factor authentication is the process of providing something you have along with something you know.

B.
Two-factor authentication is the process of providing two forms of authentication, such as a username and a password.

C.
Two-factor authentication is the process of authenticating twice during the login sequence to verify user identity.

D.
Three-factor authentication is the process of providing something you have along with something you know and something you are.

E.
Three-factor authentication is the process of providing three forms of authentication, such as username, password, and sitting at the physical machine to login.