Correct Answer: A

Rationale: Alexander Graham Bell is credited with inventing the telephone in 1876, revolutionizing global communication by enabling voice transmission over electrical wires. His breakthrough came from understanding how vibrations in sound waves could be converted into electrical signals and then reconverted into sound at a receiver. Bell’s invention paved the way for the modern telecommunications industry, leading to advancements such as mobile phones and the internet. Beyond the telephone, Bell contributed to aeronautics and hearing research, embodying the innovative spirit that defined the late 19th century’s scientific progress.

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