ANSWER:
D. Verbal, informal
It is verbal as it states that the young man "sings a humorous song." As singing is a form of verbal communication, it is verbal.
It is informal as its content is comedic and for the purpose of entertainment.
Hope this helps! :)
Did you ever figure out an answer?
The answer is B, because a simile uses "like" or "as" to compare 2 things.
I believe he tracked how people were getting affected it was the very dirty conditions he took to hospitals and places where people were sick to see if they had ever been exposed to the inhumane conditions that caused Cholera