Which of the following is responsible for MOST of the security issues? 

Answer options:

A. Outside espionage
B. Hackers
C. Personnel
D. Equipment failure

C

Personnel cause more security issues than hacker attacks, outside espionage, or equipment failure. The following answers are incorrect because: Outside espionage is incorrect as it is not the best answer. Hackers is also incorrect as it is not the best answer. Equipment failure is also incorrect as it is not the best answer. Reference : Shon Harris AIO v3 , Chapter-3: Security Management Practices , Page : 56