What is a hacker? Select one: a. Software that while purporting to serve some useful function and often fulfilling that function also allows Internet advertisers to display advertisements without the consent of the computer user. o b. Experts in technology who use their knowledge to break into computers and computer networks, either for profit or just motivated by the challenge. C. A computer attack where an attacker accesses a wireless computer network, intercepts data, uses network services, and/or sends attack instructions without entering the office or organization that owns the network. o d. A special class of adware that collects data about the user and transmits it over the Internet without the user's knowledge or permission