Choose the statement that best details the difference between a worm and a Trojan horse?

A.
Worms self replicate while Trojan horses do not.

B.
Worms are a form of malicious code while Trojan horses are not.

C.
Worms are distributed through e-mail messages while Trojan horses do not.

D.
There is no difference between a worm and a Trojan horse.

Explanation:

A worm is different from a virus. Worms reproduce themselves, are self-contained and do not
need a host application to be transported. The Trojan horse program may be installed as part of
an installation process. They do not reproduce or self replicate.
Reference:
Mike Pastore and Emmett Dulaney , Security+ Study Guide , 2nd Edition, Alameda , Sybex , 2004,
pp 83, 85