What are popup blockers designed to do?

Popup blockers are specifically designed to prevent unwanted pop-up windows from appearing on your screen while browsing the Internet. These pop-ups can include advertisements, alerts, or other unsolicited content that can disrupt the user experience. By blocking these pop-ups, users can enjoy a more streamlined and focused browsing experience without distractions.

The functionality of popup blockers is essential in maintaining smoother interactions online, as such pop-ups can also sometimes carry risks such as phishing attempts or malware. Therefore, the primary purpose of these tools is to disallow popups from appearing, making option C the correct answer.

Options that suggest allowing all popups, improving internet speed, or enhancing web application functionalities do not accurately reflect the practical role of popup blockers, which is solely focused on managing the visibility of pop-up windows to create a more user-friendly environment.