Answer:
D. banishes romeo.
Step-by-step explanation:
In a story, the antagonist is the character who is opposed to the protagonist. As Romeo and Juliet are the protagonists in the play, those who oppose them are considered the antagonists. In this case, the Prince is the antagonist because he has decided to banish Romeo from Verona. Romeo has just killed Tybalt, because Tybalt killed Mercutio. The king is unhappy with this bloodbath, and he thinks that the right way to deal with it is by banishing Romeo.