I think that its D but I didn't read the whole passage.
The topic sentence of each paragraph in an essay should support your thesis. Your thesis states the reason for writing the essay, so it is vital to include supporting details in order for your thesis to be considered valid.
You can’t use third person without saying it’s your own research , but you can say “ people conducted their own research on this topic “
the answer is B because ballads are supposed to be rhythmic
