Which of the following should always be regarded as security risks to computer systems?

Pharming and a virus are always threats, since both are built to harm or deceive users.

Pharming secretly redirects a user from a genuine site to a fake one to steal information.

A virus is malicious self-replicating code that damages files and systems.

Chat rooms are ordinary communication spaces and are not inherently dangerous.

Cookies mostly store harmless preferences, and VoIP simply carries voice calls over the internet.

Risk from chat rooms, cookies or VoIP depends on misuse, unlike the always-malicious pharming and virus.