I think option A. Is true
Answer:
Explanation:
The b7 takes the C# of a D major scale down to a regular C. This means that the notes in a D7 chord are D-F#-A-C. While a D7 can be used in any context, this type of chord can be found in a huge amount of jazz due to its massively ‘jazzy’ nature.
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Hope it helps;Pls mark as brainliest
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The answer is B hope this helps