Which of the Following Best Describes the Difference Between a Virus

Which of the following best describes the difference between a virus and a worm?

A) A virus is malicious software that requires a host file to spread itself, whereas a worm is malicious software that does not require a host file to spread itself.
B) A worm is malicious software that requires a host file to spread itself, whereas a virus is malicious software that does not require a host file to spread itself.
C) A virus is malicious software that attaches itself to executable files, whereas a worm is malicious software that attaches itself to an image file.
D) There is no difference between a virus and a worm.