What is mandatory sign-on? An authentication method that:

A.
uses smart cards, hardware tokens, and biometrics to authenticate users; also known as three-factor authentication

B.
requires the use of one-time passwords, so users authenticate only once, with a given set of credentials

C.
requires users to re-authenticate at each server and access control

D.
stores user credentials locally, so that users need only authenticate the first time a local machine is used

E.
allows users to authenticate once, and then uses tokens or other credentials to manage subsequent authentication attempts