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___________ contributed to the development of the electric motor, electric railway, and the electric elevator.

a.
Frederick Law Olmsted
c.
R.H. Macy
b.
Frank Sprague
d.
Will Rogers

Respuesta :

The answer would be B - Frank Sprague.
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Answer:

American inventor Frank Julian Sprague from Milford, Connecticut, helped a lot with respect to urban development and specially in transportation, earning the nickname of "The Father of Electric Traction"; he invented the system passing out electricity to trolleys which replaced horsecars. Thereby (b.)

Explanation:

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