Explanation
A mouse and a display would be required to satisfy the request of installing a laptop with the cover closed. A mouse is an input device that allows users to move a cursor and click on icons or buttons on the screen. A display is an output device that shows visual information on the screen. A mouse and a display would enable the user to interact with the laptop without opening the cover. A printer, a webcam, an external hard drive, and speakers are not devices that would be required to satisfy the request of installing a laptop with the cover closed. References: CompTIA IT Fundamentals+ Study Guide: Exam FC0-U61, Second Edition, Chapter 3:
Computing Components, page 106.