How does the Cisco ASA authenticate itself to the Cisco ASDM users?

By default, how does the Cisco ASA authenticate itself to the Cisco ASDM users?
A. The administrator validates the Cisco ASA by examining the factory built-in identity certificate thumbprint of the Cisco ASA.
B. The Cisco ASA automatically creates and uses a persistent self-signed X.509 certificate to authenticate itself to the administrator.
C. The Cisco ASA automatically creates a self-signed X.509 certificate on each reboot to authenticate itself to the administrator.
D. The Cisco ASA and the administrator use a mutual password to authenticate each other.
E. The Cisco ASA authenticates itself to the administrator using a one-time password.