Which of the following statements is correct about how the FortiGate unit verifies username and password during user authentication?
A. If a remote server is included in a user group, it will be checked before local accounts.
B. An administrator can define a local account for which the password must be verified by querying a remote server.
C. If authentication fails with a local password, the FortiGate unit will query the authentication server if the local user is configured with both a local password and an authentication server.
D. The FortiGate unit will only attempt to authenticate against Active Directory if Fortinet Server Authentication Extensions are installed and configured.