ah mn fui n sei muito cringe
Yes, these people are your ancestors. these people made your family from the roots.
The correct answer is C. Jazz follows a strict tradition and morality.
Jazz does not follow strict tradition and morality and is highly based on improvisation, which helped his popularity. Strict tradition would not help it.
The pitfall in credibility here is that the author is not naming himself. It's important for the author's name to be revealed so that the reader can judge the piece accordingly. He might have previous bias about the subject, or a record of improper research, so his name is key.