Who invented the light bulb?

• A. Thomas Edison
• B. Henry Ford
• C. Wright Brothers
• D. Alexander Graham Bell

Answer: (A)

The main idea here is recognizing who helped bring electric lighting into everyday use in the United States. Thomas Edison is the figure most closely linked with the invention of the practical electric light bulb and, crucially, with the system that makes it usable—a durable filament, an effective vacuum inside the bulb, and the complete electrical infrastructure (generators, wiring, and distribution) that delivers power to homes and businesses. He and his team conducted extensive testing, refining materials and designs until a long-lasting bulb could be produced reliably, which is why he is remembered for both invention and practical application.

Other notable inventors contributed to related ideas or earlier versions, but their work did not usher in the widespread, everyday electric lighting in the same way Edison did. For example, Henry Ford is famous for innovations in manufacturing cars, the Wright Brothers for the first successful powered flight, and Alexander Graham Bell for the telephone.

This moment marks a key part of the broader move toward electrification during America’s industrial growth, changing how people lived, worked, and organized their cities.