Hello,
I am not the most experienced in this area. Though, my best guess would be A. Many soul musicians have background vocalists. They are the group of people in the background of a performance singing the same song but in a different tune. They are additional sounds and are not necessarily needed within a performance.
You could show it to them and see if they like or know it.
Answer:
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Explanation:
I have a math question you could help with!