Cookies can be used to track user behavior across websites. Which choice reflects this privacy concern?

• A. Cookies always improve security.
• B. Cookies are used only for login.
• C. Cookies can be used to track user behavior across websites.
• D. Cookies encrypt data in transit.

Answer: (C)

Cookies are small data pieces stored in your browser by websites. When third-party cookies are involved, the same advertiser or analytics network can read those cookies across many sites, which enables tracking your behavior as you browse from one site to another. That cross-site tracking is exactly the privacy concern here: it lets firms build a profile of your interests and habits, often with limited or unclear consent. This is why the option stating that cookies can be used to track user behavior across websites is the best choice.

Other statements aren’t accurate for this issue: cookies don’t inherently make you more secure; they’re not only for login (they also remember preferences, shopping carts, and other data); and cookies don’t encrypt data in transit—encryption is provided by the secure transport layer (HTTPS), not by the cookie itself.