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Which detail best supports the main idea

Which detail best supports the main idea-example-1
User Kara Potts
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2 Answers

7 votes
the correct answer is the third one
User Aetrnm
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4 votes
The correct answer is the 3rd one.

Many people felt the sound didn't come out loud enough, so other inventors figured out ways to use electricity to make the sound louder.
User Praxeolitic
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