What Are Destructive Agents

What are destructive agents?

A) A form of social engineering in which one individual lies to obtain confidential data about another individual.
B) A hacker looks through your trash to find personal information.
C) Legitimate users who purposely or accidentally misuse their access to the environment and cause some kind of business-affecting incident.
D) Malicious agents designed by spammers and other Internet attackers to farm email addresses off websites or deposit spyware on machines.