Are viruses used to infect systems to compromise computers or data?

The selection of "B. Never" is incorrect because viruses are indeed used to infect systems, which can compromise computers and data.

In the context of computer security and malware, viruses are a type of malicious software designed specifically to spread from one computer to another, often without the user's knowledge. They can corrupt or steal data, disrupt operations, and facilitate unauthorized access to systems.

While not every instance of a virus leads to data compromise—some may just cause glitches or annoyances—the principal purpose of many viruses is to exploit vulnerabilities in systems to achieve harmful outcomes. Therefore, the correct understanding aligns more closely with the idea that viruses are used to compromise systems, rather than stating they are never used for this purpose.

The other options highlight varying frequencies or contexts in which viruses are used, but do not accurately capture the pervasive threat they represent in the realm of cybersecurity.