JULIET: [15] O Romeo, Romeo! wherefore3 art thou Romeo? Deny thy father, and refuse thy name;
Or, if thou wilt not, be but sworn my love,
And I’ll no longer be a Capulet.
ROMEO:
1.
2. 3.
[Aside] Shall I hear more, or shall I speak at this?4
In this context, "mutiny" means violence or turmoil. The more modern use of "mutiny" refers to a rebellion against authority.
Whatever hasn't been mentioned (in the prologue) will be explained on stage.
“Wherefore” means “why.”

JULIET:
[20] ’Tis but thy name that is my enemy;
Thou art thyself, though not a Montague. What’s Montague? it is nor hand, nor foot, Nor arm, nor face, nor any other part Belonging to a man. O! be some other name:
[25] What’s in a name? that which we call a rose By any other name would smell as sweet; So Romeo would, were he not Romeo call’d, Retain that dear perfection which he owes Without that title. Romeo, doff5 thy name;
[30] And for that name, which is no part of thee, Take all myself.

4. How does Juliet’s monologue in lines 15-31 affect Romeo?
A. He is shocked by her insistence that he give up his name.
B. He regrets being a Montague but resigns himself to being apart from Juliet.
C. He is willing to give up his family name in order to be with her.
D. He falls more in love with her and convinces her to marry him.