Which of the following defines the difference, if any, between a Trojan horse and a worm?
A. Worms self-replicate but Trojan horses do not.
B. There is no difference; the two are the same.
C. Worms are sent via e-mail; Trojan horses are not.
D. Trojan horses are malicious attacks; worms are not.
Answer: A. Worms self-replicate but Trojan horses do not.