Explanation/Reference:
Explanation:
Prevention of the modification of information by authorized users is not one of the three goals of integrity addressed by the Clark-Wilson model.
Clark-Wilson addresses the following three goals of integrity in its model:
Prevent unauthorized users from making modifications

Prevent authorized users from making improper modifications (separation of duties)

Maintain internal and external consistency (well-formed transaction)

The Clark-Wilson model enforces the three goals of integrity by using access triple (subject, software [TP], object), separation of duties, and auditing. This model enforces integrity by using well-formed transactions (through access triple) and separation of duties.
Incorrect Answers:
A: Prevention of the modification of information by unauthorized users is one of the three goals of integrity addressed by the Clark-Wilson model.
B: Prevention of the unauthorized or unintentional modification of information by authorized users is one of the three goals of integrity addressed by the Clark-Wilson model.
C: Preservation of the internal and external consistency is one of the three goals of integrity addressed by the Clark-Wilson model.
References:
Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, New York, 2013, p. 374

Is correct because that is exactly what Kerberos is.
The following answers are incorrect:
A three-headed dog from Egyptian mythology. Is incorrect because we are dealing with
Information Security and not the Egyptian mythology but the Greek Mythology.
A security model. Is incorrect because Kerberos is an authentication protocol and not just a security model.
A remote authentication dial in user server. Is incorrect because Kerberos is not a remote authentication dial in user server that would be called RADIUS.

To make violation tracking effective, clipping levels must be established. A clipping level is a baseline of user activity that is considered a routine level of user errors. When a clipping level is exceeded, a violation record is then produced. Clipping levels are also used for variance detection. -Ronald Krutz The CISSP PREP Guide (gold edition) pg 318