Based on the information given, the repetition of the phrase was because D. It personifies the singer's thoughts and emotions.
It should be noted that in the excerpt, the speaker stated that "Ain't got nobody in all this world, Ain't got nobody but ma self. I’s gwine to quit ma frownin' And put ma troubles on the shelf".
It should be noted that the effect of repeating the phrase “ain't got nobody” in the poem is that it personifies the singer's thoughts and emotions.
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Answer:
A) It emphasizes the theme of sorrow and melancholy in the poem.
