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Computer viruses come in many forms. Which of the following descriptions is NOT about a computer virus?
The virus is attached to a program and runs each time the program is opened.
The virus is disguised as an accounting program and runs when the program is opened.
The virus is sent as an email that asks recipients for their credit card numbers.
The virus is a piece of software that looks for security holes in a network and uses those holes to infect other computers.