Who is considered an insider?

A majority of attacks come from insiders, people who have direct access to a company’s computer system as part of their job function or a business relationship. Who is considered an insider?

A.
A government agency since they know the company’s computer system strengths and weaknesses

B.
A competitor to the company because they can directly benefit from the publicity generated by making such an attack

C.
The CEO of the company because he has access to all of the computer systems

D.
Disgruntled employee, customers, suppliers, vendors, business partners, contractors, temps, and consultants

Explanation:
An insider is anyone who already has an foot inside one way or another.