A company has implemented full disk encryption. Clients must authenticate with a username and
password at a pre-boot level to unlock the disk and again a username and password at the network login.
Which of the following are being used? (Select TWO)

A.
Multifactor authentication

B.
Single factor authentication

C.
Something a user is

D.
Something a user has

E.
Single sign-on

F.
Something a user knows