Who says the following and why?

Consort! What! dost thou make us minstrels? an thou make minstrels of us, look to hear nothing but discords: here's my fiddlestick; here's that shall make you dance. 'Zounds! consort! (III, i, 22)

AMercutio is challenging Tybalt for insulting Romeo.
BTybalt is challenging Romeo for crashing last night's party.
CRomeo is challenging Tybalt for killing Mercutio.
DMercutio is teasing Benvolio.