The option that best paraphrases why prince is angry with Capulet and Montague is the third.
Their families have recently started three street fights.
The Prince of Verona wants to maintain peace. However, he can't restrain the violence between the Montagues and the Capulets. If the Prince can't do anything about the feud, it means that the law (which the Prince embodies) is powerless against the passions of hate and of love. As the seat of political power in Verona, he is concerned about maintaining the public peace at all costs.
