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OpenStudy (k12girlohva):

The internal combustion engine was an innovation of A. Guglielmo Marconi B. Thomas Edison C. Alexander Graham Bell D. Jean Lenoir E. Gustav Eiffel

OpenStudy (youngstudier):

What do you think the answer is? :)

OpenStudy (k12girlohva):

D?

OpenStudy (youngstudier):

Correct. Great job! ^_^

OpenStudy (k12girlohva):

tysm<3

OpenStudy (youngstudier):

No problem! ~(^_^)~

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