Final answer:
The best solution to mitigate the issue of interfering boxes on screen when accessing certain websites is A. Pop-up blockers. They prevent unwanted pop-up windows from appearing on a web page.
Step-by-step explanation:
The best solution to mitigate the issue of different boxes appearing on the screen when accessing certain websites is A. Pop-up blockers. Pop-up blockers are software programs that prevent unwanted pop-up windows from appearing on a web page. They can be easily installed on web browsers and will help prevent the interference of these boxes, allowing users to access legitimate sites without any disturbances.
URL filtering, option B, is a different type of software that blocks access to certain websites based on their web addresses. While URL filtering can be effective in restricting access to inappropriate or untrusted sites, it may not directly address the issue of interfering boxes on screen.
Option C, Antivirus, focuses on protecting computer systems from viruses and other malicious software, but may not specifically address the problem of interfering boxes on screen.
Option D, Anti-spam, is designed to filter out and block unsolicited and unwanted emails, again not directly related to the issue at hand.