Which of the following malware types may require user interaction, does not hide itself, and is
commonly identified by marketing pop-ups based on browsing habits?

A.
Botnet

B.
Rootkit

C.
Adware

D.
Virus

Explanation:
Adware is free software that is supported by advertisements. Common adware programs are
toolbars, games and utilities. They are free to use, but require you to watch advertisements as
long as the programs are open. Adware typically requires an active Internet connection to run.