Mercutio is Romeo's best friend. Mercutio likes to have a good laugh, is optimistic, loyal, and a good friend. When Romeo is depressed because of his unrequited love for Rosaline, it is Mercutio that suggests they should all gate-crash the Capulet party.
He uses language because he believes what he did was right. He knew how much Romeo and Juliet loved each other.
I'm pretty sure that the answer is D. Either D or C, but probably D.
It is located at the second word. The simple predicate is "wrote".
