Denial of Service (DoS) Attack Is a (An)

Denial of service (DoS) attack is a (an)

A) Unsolicited e-mail message or newsgroups posting sent to many recipients or newsgroups at once
B) Assault on a computer or network whose purpose is to disrupt computer access to an Internet service such as the Web or e-mail
C) Computer security risk that occurs when someone steals personal or confidential information
D) Scam in which a perpetrator sends an official looking e-mail that attempts to obtain your personal and financial information
E) None of the above