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Which of the following does not use electricity or radio waves to communicate? A.Radio B.Telephone C.Pony Express D.Telegraph
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3 votes
Which of the following does not use electricity or radio waves to communicate?

A.Radio
B.Telephone
C.Pony Express
D.Telegraph

User Mariatta
by
8.4k points

1 Answer

3 votes
All the devices listed above use waves except pony express. Therefore the answer is C.
User Ihtsham Minhas
by
8.3k points
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