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  • Alexander Graham Bell, known as the inventor of the telephone, is also credited with the invention of this device, which was first used after the assassination of President James Garfield.
Question 1:
Alexander Graham Bell, known as the inventor of the telephone, is also credited with the invention of this device, which was first used after the assassination of President James Garfield.
A. metal detector
B. phonograph
C. audiometer
D. air conditioning

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