What does romeo do to stop the fight between mercutio and Tybalt?

Rather speculative, isn't it? Here are some possibilities, some more reasonable than others:

1) Benvolio tells Romeo that Tybalt is for the chop anyway having killed Mercutio in a street brawl, so why not let the law do its work?

2) Tybalt heads straight for the Capulet mansion where he hides in the cellar until Romeo calms down.

3) Benvolio persuades Romeo that it wasn't his fault and to stop blaming himself.

4) Romeo's father happens by and sets the guards on Tybalt.

5) Romeo is abducted by aliens before he has a chance to get to Tybalt.

6) City guards come by and mistakenly arrest Romeo for Mercutio's death.

7) Romeo trips while chasing after Tybalt and knocks himself out, waking up two days later.

8) Tybalt doesn't watch where he is going and a flat of bricks falls on him from a second-story window.

9) Juliet passes by on her way back home, and Romeo remembers why he shouldn't fight Tybalt.

10) Benvolio decides to fight Tybalt instead, and knocks Romeo out to do it.