How does FortiGate verify the login credentials of a remote LDAP user?

A. FortiGate sends the user entered credentials to the LDAP server for authentication.

B. FortiGate re-generates the algorithm based on the login credentials and compares it against the algorithm stored on the LDAP server.

C. FortiGate queries its own database for credentials.

D. FortiGate queries the LDAP server for credentials.