Which of the following is most affected by denial-of-service (DOS) attacks?

Which of the following is most affected by denial-of-service (DOS) attacks?
A .  Confidentiality
B .  Integrity
C .  Accountability
D .  Availability

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Answer: D

Explanation: Denial of service attacks obviously affect availability of targeted systems. Source: KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, John Wiley & Sons, 2001, Chapter 3: Telecommunications and Network Security (page 61).