I think it was to show how Mercutio and Benvolio were laughing and slightly mocking the capulets whilst also adding the idea that they always pick the fights and are the antagonists
#1- CD's
#2- Because they can see what their personality is. Or what kind of person you are that would fit the role.
#3- I don't know what that word is...
I hope I helped! ;)
Answer:
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Explanation: