Answer:
I believe its B and C
Explanation:
<u><em>If I'm wrong please tell me so I can correct my answer.</em></u>
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submarinismo is scuba diving but Bueco is dive
I have a hunch that you're not talking about overtime
OR overtune. I think you're going for overtone .
For a fundamental frequency of 528 Hz,
1,056 Hz is the second harmonic.
I think it’s the first option