What is adware?
A. adware is programming masked as advertisements that cause undesirable or invasive activities on clients' pcs.
B. adware is a program that uses a computer network to replicate and propagate throughout the system
C. adware is designed to carry out specific tasks only that are designed to emulate human interactivity
D. adware is a part of the WWW unaccessible via web browsers often used for covert or illegal activites