Who invented the telephone?

Alexander Graham Bell is widely credited with inventing the telephone and securing the first U.S. patent for it in 1876. His invention revolutionized communication, allowing voices to be transmitted over long distances and fundamentally changing how people interacted globally.

• (A) Nikola Tesla is incorrect; he was known for his contributions to alternating current electricity and radio technology.
• (B) Thomas Edison is incorrect; he was a prolific inventor known for the light bulb, phonograph, and motion picture camera.
• (C) Alexander Graham Bell is correct as he invented the telephone.
• (D) Albert Einstein is incorrect; he was a theoretical physicist known for his theories of relativity.