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Question

Nancy visits a zoo and records the voices of a few animals. From these recordings, she generates some plots representing sound waves as shown below. Which of the following points can we infer from these plots?

A
Tune A and tune D have the same pitch.
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B
Tune A and tune C have the same loudness.
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C
Tune C and tune D have the same loudness.
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D
Tune B and tune C have the same pitch.
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