In the song, the main reason Dylan uses ain't instead of isn't and instead of them is to show that he is not prejudiced is not part of the lower class can use dialect is not prejudiced does not understand grammar.
Dialects or variations of a particular language are closely related and, despite their differences, are most often mutually intelligible, especially if they are close to each other on the dialect continuum. The term is most often used for regional speech patterns, but dialect can also be defined by other factors such as social class or ethnicity.
Hence, the correct answer is 'not prejudiced'
Learn more about Dialects on https://brainly.com/question/20032366
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