Which of the following best describes a computer worm?

Correct option is D

A computer worm is a type of malware that replicates itself without needing to attach to a host program or file. It spreads autonomously through networks or devices.
Key Characteristics of Worms:
· Standalone software that does not rely on other programs to spread.
· Exploits vulnerabilities in network protocols or operating systems.
Information Booster:
1. Difference Between Worms and Viruses:
· Worms: Self-replicate without requiring a host file or program.
· Viruses: Require a host program or file to spread.
2. Common Examples: Morris Worm, WannaCry.
Additional Knowledge:
Option (a): Incorrect; describes social engineering tactics used by some malware but not worms.
Option (b): Incorrect; describes macro viruses, which attach to documents.
Option (c): Incorrect; describes executable file viruses.