What Is the Difference Between a Virus and a Worm

Multiple Choice

What is the difference between a virus and a worm?

A) A worm is a computer program designed to harm a computer once the user has opened it; a virus is a single file that works through a computer or network.
B) A virus can potentially cause a lot of damage to a computer system; a worm only monitors a user's online activity without their knowledge but does not damage any files.
C) A virus is a computer program designed to harm a computer once the user has opened it; a worm is a single file that works through a computer or network.
D) Damage caused by a virus can be repaired; damage caused by a worm is always irreparable.