Jerry suspects that information about his internet usage was sent to external websites without his knowledge. He is wary about the subscription newsletters and advertisements arriving in his mailbox. Which type of software should he use to restrict his information from going out to these websites?
I would say some kind of anti-cookie software. Cookies are what the websites store to track info about you and your preferences. If you blocked their data collectors or turned off cookies for websites, you would likely stop getting ads and newsletters.