A. John McAfee
B. Douglas Carl Engelbart
C. Bill Gates
D. Evan Williams
🧠 Explanation:
Douglas Carl Engelbart invented the computer mouse in the 1960s, revolutionizing human-computer interaction. His prototype, a wooden device with wheels, enabled cursor control, replacing text-based inputs. Patented in 1970, it became integral to modern computing, especially with graphical interfaces like Windows. Engelbart’s innovation enhanced user efficiency, shaping today’s intuitive interfaces. Understanding the mouse’s origin is key in computer science history, highlighting how simple inventions transformed technology. Its impact persists in devices from laptops to gaming, making it a cornerstone of user-friendly computing.