Answer:
To explain the play to the audience.
Explanation:
Chorus, in drama and music, those who perform vocally in a group as opposed to those who perform singly. The chorus in Classical Greek drama was a group of actors who described and commented upon the main action of a play with song, dance, and recitation.
The heading in a business letter should tell you where and when
I believe it would be option A, it states that his father believes that he is a traitor and his tone and language suggests anger and resentment at the fact that his son is joining