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Correct Answer: C) Wheelbarrow.
Correct Answer: B) 14 years after it was created.
Correct Answer: C) J.J.Thompson.
Correct Answer: D) Ended.
Correct Answer: B) FrankJulian Sprague.
Correct Answer: C) Research and development.
Correct Answer: A) Melitta Bentz.
Correct Answer: C) Alexander Graham Bell.
Correct Answer: C) Proton.
Correct Answer: B) Raytheon.
Correct Answer: A) Bain.
Correct Answer: D) The indoor cloud maker.
Correct Answer: B) Confucius.
Correct Answer: C) Samuel F.B. Morse.
Correct Answer: B) 1804.
Correct Answer: A) Leo H Baekeland.
Correct Answer: C) 1979.
Correct Answer: D) 1990.
Correct Answer: A) Because he was a dentist and used it on his patients who requested to buy it.
Correct Answer: B) Doisy & Dam.
Correct Answer: C) Thomas Edison.
Correct Answer: D) Parachute.
Correct Answer: C) George Washington Carver.
Correct Answer: A) Steve Jobs.
Correct Answer: C) Does not say.