How is the main conflict in Romeo and Juliet resolved?

(Really important, please help!!)


A: Tybalt murders Mercutio in the streets of Verona.


B: Romeo and Juliet get past their quarrel and marry.


C: Mercutio convinces Romeo to give up his infatuation with Rosaline.


D: The deaths of Juliet and Romeo cause their families to end with feud.