It is the '<span>Two men argue about whose football team is better.</span>' Because you can see that two characters are arguing about what football team is better.
Answer:
Well he talks about a really serious topic and how it needs to be changed:) [which is slavery]
Answer:
C) citing all sources
Explanation:
Essentially, by naming your source right after posting or using the piece or conclusion of someone else's work that you utilized, you are granting recognition to the one responsible for that particular data and in this way you maintain a strategic distance from falsification/plagiarism.
I go with "Whom". It makes sense.