Here are the answers to the questions: Which of these is a common effect of a computer virus? A computer virus is malicious software that can cause various issues. Fans spinning slower is not a typical effect; often, viruses increase CPU usage, making fans spin faster. Dead pixels on a monitor are a hardware defect. Sticky or unresponsive keyboard keys are a physical hardware issue. Viruses commonly consume system resources, leading to slowdowns, crashes, and unwanted pop-up messages. The correct option is: The computer slows down significantly, crashes frequently, or displays unexpected pop-up messages. A subscribed database in the library is one that... A subscribed database provides access to a collection of digital resources (like articles, journals, e-books) that the library pays for. This content is typically not freely available through general search engines. The correct option is: The library pays for temporary access to commercial content that cannot get for free through a standard Google search.