题目内容
（请给出正确答案）
[主观题]
Which of the following about a computer virus is not true？ A．It is a piece of software whose purpos
Which of the following about a computer virus is not true？
A．It is a piece of software whose purpose is to replicate.
B．It is a program that gains control over its host in various ways.
C．It all contains code which won't be activated without a trigger mechanism.
D．It sometimes attaches to a file.
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